Auto merge of #12224 - nox:die-util-die, r=Ms2ger

Remove some stuff from util

<!-- Reviewable:start -->
This change is [<img src="https://reviewable.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/12224)
<!-- Reviewable:end -->

40 files changed, 120 insertions, 184 deletions

diff --git a/components/canvas/canvas_paint_thread.rs b/components/canvas/canvas_paint_thread.rs
index 1faf41a9aed..c69b2039c44 100644
--- a/components/canvas/canvas_paint_thread.rs
+++ b/components/canvas/canvas_paint_thread.rs
@@ -19,7 +19,6 @@ use std::borrow::ToOwned;
 use std::mem;
 use util::opts;
 use util::thread::spawn_named;
-use util::vec::byte_swap;
 use webrender_traits;
 
 impl<'a> CanvasPaintThread<'a> {
diff --git a/components/canvas/webgl_paint_thread.rs b/components/canvas/webgl_paint_thread.rs
index a9fe55a848a..2c77f63b82b 100644
--- a/components/canvas/webgl_paint_thread.rs
+++ b/components/canvas/webgl_paint_thread.rs
@@ -2,7 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use canvas_traits::{CanvasCommonMsg, CanvasMsg, CanvasPixelData, CanvasData, FromLayoutMsg};
+use canvas_traits::{CanvasCommonMsg, CanvasData, CanvasMsg, CanvasPixelData};
+use canvas_traits::{FromLayoutMsg, byte_swap};
 use euclid::size::Size2D;
 use gleam::gl;
 use ipc_channel::ipc::{self, IpcSender, IpcSharedMemory};
@@ -10,7 +11,6 @@ use offscreen_gl_context::{ColorAttachmentType, GLContext, GLLimits, GLContextAt
 use std::borrow::ToOwned;
 use std::sync::mpsc::channel;
 use util::thread::spawn_named;
-use util::vec::byte_swap;
 use webrender_traits;
 
 enum WebGLPaintTaskData {
diff --git a/components/canvas_traits/lib.rs b/components/canvas_traits/lib.rs
index 98eaa159077..db945750a0c 100644
--- a/components/canvas_traits/lib.rs
+++ b/components/canvas_traits/lib.rs
@@ -539,3 +539,16 @@ impl ToAzColor for RGBA {
                     self.alpha as AzFloat)
     }
 }
+
+// TODO(pcwalton): Speed up with SIMD, or better yet, find some way to not do this.
+pub fn byte_swap(data: &mut [u8]) {
+    let length = data.len();
+    // FIXME(rust #27741): Range::step_by is not stable yet as of this writing.
+    let mut i = 0;
+    while i < length {
+        let r = data[i + 2];
+        data[i + 2] = data[i + 0];
+        data[i + 0] = r;
+        i += 4;
+    }
+}
diff --git a/components/compositing/compositor.rs b/components/compositing/compositor.rs
index b77847eb1c8..9e540b7d7af 100644
--- a/components/compositing/compositor.rs
+++ b/components/compositing/compositor.rs
@@ -14,6 +14,7 @@ use euclid::rect::TypedRect;
 use euclid::scale_factor::ScaleFactor;
 use euclid::size::TypedSize2D;
 use euclid::{Matrix4D, Point2D, Rect, Size2D};
+use gfx_traits::print_tree::PrintTree;
 use gfx_traits::{ChromeToPaintMsg, PaintRequest, ScrollPolicy, StackingContextId};
 use gfx_traits::{color, Epoch, FrameTreeId, FragmentType, LayerId, LayerKind, LayerProperties};
 use gleam::gl;
@@ -51,7 +52,6 @@ use url::Url;
 use util::geometry::{PagePx, ScreenPx, ViewportPx};
 use util::opts;
 use util::prefs::PREFS;
-use util::print_tree::PrintTree;
 use webrender;
 use webrender_traits::{self, ScrollEventPhase};
 use windowing::{self, MouseWindowEvent, WindowEvent, WindowMethods, WindowNavigateMsg};
diff --git a/components/gfx/display_list/mod.rs b/components/gfx/display_list/mod.rs
index 25b7c46075f..3eed504303b 100644
--- a/components/gfx/display_list/mod.rs
+++ b/components/gfx/display_list/mod.rs
@@ -23,6 +23,7 @@ use euclid::rect::TypedRect;
 use euclid::side_offsets::SideOffsets2D;
 use euclid::{Matrix2D, Matrix4D, Point2D, Rect, Size2D};
 use fnv::FnvHasher;
+use gfx_traits::print_tree::PrintTree;
 use gfx_traits::{LayerId, ScrollPolicy, StackingContextId};
 use ipc_channel::ipc::IpcSharedMemory;
 use msg::constellation_msg::PipelineId;
@@ -45,7 +46,6 @@ use style_traits::cursor::Cursor;
 use text::TextRun;
 use text::glyph::ByteIndex;
 use util::geometry::{self, MAX_RECT, ScreenPx};
-use util::print_tree::PrintTree;
 use webrender_traits::{self, WebGLContextId};
 
 pub use style::dom::OpaqueNode;
diff --git a/components/gfx_traits/lib.rs b/components/gfx_traits/lib.rs
index 9d01f883389..8b34d1b3b78 100644
--- a/components/gfx_traits/lib.rs
+++ b/components/gfx_traits/lib.rs
@@ -23,6 +23,7 @@ extern crate serde;
 
 pub mod color;
 mod paint_listener;
+pub mod print_tree;
 
 pub use paint_listener::PaintListener;
 use azure::azure_hl::Color;
diff --git a/components/util/print_tree.rs b/components/gfx_traits/print_tree.rs
index 7a6ac4f0be9..7a6ac4f0be9 100644
--- a/components/util/print_tree.rs
+++ b/components/gfx_traits/print_tree.rs
diff --git a/components/layout/block.rs b/components/layout/block.rs
index ab810c59521..41d382f3004 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -44,6 +44,7 @@ use flow_ref::FlowRef;
 use fragment::SpecificFragmentInfo;
 use fragment::{CoordinateSystem, Fragment, FragmentBorderBoxIterator, HAS_LAYER, Overflow};
 use gfx::display_list::{ClippingRegion, StackingContext};
+use gfx_traits::print_tree::PrintTree;
 use gfx_traits::{LayerId, StackingContextId};
 use layout_debug;
 use model::{CollapsibleMargins, MaybeAuto, specified, specified_or_none};
@@ -62,7 +63,6 @@ use style::servo::SharedStyleContext;
 use style::values::computed::{LengthOrNone, LengthOrPercentageOrNone};
 use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto};
 use util::geometry::MAX_RECT;
-use util::print_tree::PrintTree;
 
 /// The number of screens of data we're allowed to generate display lists for in each direction.
 const DISPLAY_PORT_SIZE_FACTOR: i32 = 8;
diff --git a/components/layout/flow.rs b/components/layout/flow.rs
index 73277288e3b..1c53740c402 100644
--- a/components/layout/flow.rs
+++ b/components/layout/flow.rs
@@ -35,6 +35,7 @@ use flow_list::{FlowList, FlowListIterator, MutFlowListIterator};
 use flow_ref::{self, FlowRef, WeakFlowRef};
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow, SpecificFragmentInfo};
 use gfx::display_list::{ClippingRegion, StackingContext};
+use gfx_traits::print_tree::PrintTree;
 use gfx_traits::{LayerId, LayerType, StackingContextId};
 use inline::InlineFlow;
 use model::{CollapsibleMargins, IntrinsicISizes, MarginCollapseInfo};
@@ -61,7 +62,6 @@ use table_colgroup::TableColGroupFlow;
 use table_row::TableRowFlow;
 use table_rowgroup::TableRowGroupFlow;
 use table_wrapper::TableWrapperFlow;
-use util::print_tree::PrintTree;
 
 /// Virtual methods that make up a float context.
 ///
diff --git a/components/layout/inline.rs b/components/layout/inline.rs
index af1f6c878cd..6195024f2ca 100644
--- a/components/layout/inline.rs
+++ b/components/layout/inline.rs
@@ -21,6 +21,7 @@ use gfx::display_list::{OpaqueNode, StackingContext};
 use gfx::font::FontMetrics;
 use gfx::font_context::FontContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use layout_debug;
 use model::IntrinsicISizesContribution;
 use range::{Range, RangeIndex};
@@ -41,7 +42,6 @@ use style::values::computed::LengthOrPercentage;
 use text;
 use unicode_bidi;
 use util;
-use util::print_tree::PrintTree;
 
 // From gfxFontConstants.h in Firefox
 static FONT_SUBSCRIPT_OFFSET_RATIO: f32 = 0.20;
diff --git a/components/layout/multicol.rs b/components/layout/multicol.rs
index e8e974ec5a2..e2bb1a66f79 100644
--- a/components/layout/multicol.rs
+++ b/components/layout/multicol.rs
@@ -17,6 +17,7 @@ use flow_ref::{self, FlowRef};
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use std::cmp::{min, max};
 use std::fmt;
 use std::sync::Arc;
@@ -25,7 +26,6 @@ use style::logical_geometry::LogicalSize;
 use style::properties::{ComputedValues, ServoComputedValues};
 use style::servo::SharedStyleContext;
 use style::values::computed::{LengthOrPercentageOrAuto, LengthOrPercentageOrNone};
-use util::print_tree::PrintTree;
 
 pub struct MulticolFlow {
     pub block_flow: BlockFlow,
diff --git a/components/layout/parallel.rs b/components/layout/parallel.rs
index ba23c0d7061..9e1009ce835 100644
--- a/components/layout/parallel.rs
+++ b/components/layout/parallel.rs
@@ -17,10 +17,10 @@ use std::sync::atomic::{AtomicIsize, Ordering};
 use style::dom::UnsafeNode;
 use style::parallel::run_queue_with_custom_work_data_type;
 use style::parallel::{CHUNK_SIZE, WorkQueueData};
+use style::workqueue::{WorkQueue, WorkUnit, WorkerProxy};
 use traversal::AssignBSizes;
 use traversal::{AssignISizes, BubbleISizes};
 use util::opts;
-use util::workqueue::{WorkQueue, WorkUnit, WorkerProxy};
 
 pub use style::parallel::traverse_dom;
 
diff --git a/components/layout/table.rs b/components/layout/table.rs
index 0299d9b9b01..4f41cdb681f 100644
--- a/components/layout/table.rs
+++ b/components/layout/table.rs
@@ -18,6 +18,7 @@ use flow_list::MutFlowListIterator;
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use layout_debug;
 use model::{IntrinsicISizes, IntrinsicISizesContribution, MaybeAuto};
 use script_layout_interface::restyle_damage::{REFLOW, REFLOW_OUT_OF_FLOW};
@@ -33,7 +34,6 @@ use style::values::computed::LengthOrPercentageOrAuto;
 use table_row::TableRowFlow;
 use table_row::{self, CellIntrinsicInlineSize, CollapsedBorder, CollapsedBorderProvenance};
 use table_wrapper::TableLayout;
-use util::print_tree::PrintTree;
 
 /// A table flow corresponded to the table's internal table fragment under a table wrapper flow.
 /// The properties `position`, `float`, and `margin-*` are used on the table wrapper fragment,
diff --git a/components/layout/table_caption.rs b/components/layout/table_caption.rs
index ad7c43d3f99..aaa038a4b57 100644
--- a/components/layout/table_caption.rs
+++ b/components/layout/table_caption.rs
@@ -15,12 +15,12 @@ use flow::{Flow, FlowClass, OpaqueFlow};
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use std::fmt;
 use std::sync::Arc;
 use style::logical_geometry::LogicalSize;
 use style::properties::ServoComputedValues;
 use style::servo::SharedStyleContext;
-use util::print_tree::PrintTree;
 
 /// A table formatting context.
 pub struct TableCaptionFlow {
diff --git a/components/layout/table_cell.rs b/components/layout/table_cell.rs
index 8b6db89ff38..58bb96cfbf6 100644
--- a/components/layout/table_cell.rs
+++ b/components/layout/table_cell.rs
@@ -16,6 +16,7 @@ use flow::{self, Flow, FlowClass, OpaqueFlow};
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use layout_debug;
 use model::MaybeAuto;
 use script_layout_interface::restyle_damage::REFLOW;
@@ -28,7 +29,6 @@ use style::properties::{ComputedValues, ServoComputedValues};
 use style::servo::SharedStyleContext;
 use table::InternalTable;
 use table_row::{CollapsedBorder, CollapsedBorderProvenance};
-use util::print_tree::PrintTree;
 
 /// A table formatting context.
 #[derive(RustcEncodable)]
diff --git a/components/layout/table_row.rs b/components/layout/table_row.rs
index b8835d493ef..0406b7a806b 100644
--- a/components/layout/table_row.rs
+++ b/components/layout/table_row.rs
@@ -17,6 +17,7 @@ use flow_list::MutFlowListIterator;
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use layout_debug;
 use model::MaybeAuto;
 use rustc_serialize::{Encodable, Encoder};
@@ -31,7 +32,6 @@ use style::servo::SharedStyleContext;
 use style::values::computed::LengthOrPercentageOrAuto;
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable, VecExt};
 use table_cell::{CollapsedBordersForCell, TableCellFlow};
-use util::print_tree::PrintTree;
 
 /// A single row of a table.
 pub struct TableRowFlow {
diff --git a/components/layout/table_rowgroup.rs b/components/layout/table_rowgroup.rs
index 91dcb0f00a2..21d6a00cb74 100644
--- a/components/layout/table_rowgroup.rs
+++ b/components/layout/table_rowgroup.rs
@@ -15,6 +15,7 @@ use flow::{Flow, FlowClass, OpaqueFlow};
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use layout_debug;
 use rustc_serialize::{Encodable, Encoder};
 use std::fmt;
@@ -26,7 +27,6 @@ use style::properties::{ComputedValues, ServoComputedValues};
 use style::servo::SharedStyleContext;
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize, InternalTable, TableLikeFlow};
 use table_row;
-use util::print_tree::PrintTree;
 
 /// A table formatting context.
 pub struct TableRowGroupFlow {
diff --git a/components/layout/table_wrapper.rs b/components/layout/table_wrapper.rs
index c331cd9ee2a..b88819274e1 100644
--- a/components/layout/table_wrapper.rs
+++ b/components/layout/table_wrapper.rs
@@ -24,6 +24,7 @@ use flow::{Flow, FlowClass, ImmutableFlowUtils, INLINE_POSITION_IS_STATIC, Opaqu
 use fragment::{Fragment, FragmentBorderBoxIterator, Overflow};
 use gfx::display_list::StackingContext;
 use gfx_traits::StackingContextId;
+use gfx_traits::print_tree::PrintTree;
 use model::MaybeAuto;
 use std::cmp::{max, min};
 use std::fmt;
@@ -37,7 +38,6 @@ use style::values::CSSFloat;
 use style::values::computed::LengthOrPercentageOrAuto;
 use table::{ColumnComputedInlineSize, ColumnIntrinsicInlineSize};
 use table_row;
-use util::print_tree::PrintTree;
 
 #[derive(Copy, Clone, RustcEncodable, Debug)]
 pub enum TableLayout {
diff --git a/components/layout_thread/lib.rs b/components/layout_thread/lib.rs
index bcb0373ab20..fe1f82f533b 100644
--- a/components/layout_thread/lib.rs
+++ b/components/layout_thread/lib.rs
@@ -110,13 +110,13 @@ use style::refcell::RefCell;
 use style::selector_matching::USER_OR_USER_AGENT_STYLESHEETS;
 use style::servo::{Animation, LocalStyleContextCreationInfo, SharedStyleContext, Stylesheet, Stylist};
 use style::stylesheets::CSSRuleIteratorExt;
+use style::workqueue::WorkQueue;
 use url::Url;
 use util::geometry::MAX_RECT;
 use util::ipc::OptionalIpcSender;
 use util::opts;
 use util::thread;
 use util::thread_state;
-use util::workqueue::WorkQueue;
 
 /// The number of screens we have to traverse before we decide to generate new display lists.
 const DISPLAY_PORT_THRESHOLD_SIZE_FACTOR: i32 = 4;
diff --git a/components/script/dom/canvasrenderingcontext2d.rs b/components/script/dom/canvasrenderingcontext2d.rs
index fc6afdc2b25..1c6f83651d1 100644
--- a/components/script/dom/canvasrenderingcontext2d.rs
+++ b/components/script/dom/canvasrenderingcontext2d.rs
@@ -3,8 +3,9 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use canvas_traits::{Canvas2dMsg, CanvasCommonMsg, CanvasMsg};
-use canvas_traits::{CompositionOrBlending, LineCapStyle, LineJoinStyle};
-use canvas_traits::{FillOrStrokeStyle, FillRule, LinearGradientStyle, RadialGradientStyle, RepetitionStyle};
+use canvas_traits::{CompositionOrBlending, FillOrStrokeStyle, FillRule};
+use canvas_traits::{LineCapStyle, LineJoinStyle, LinearGradientStyle};
+use canvas_traits::{RadialGradientStyle, RepetitionStyle, byte_swap};
 use cssparser::Color as CSSColor;
 use cssparser::{Parser, RGBA};
 use dom::bindings::cell::DOMRefCell;
@@ -46,7 +47,6 @@ use std::str::FromStr;
 use std::{cmp, fmt};
 use unpremultiplytable::UNPREMULTIPLY_TABLE;
 use url::Url;
-use util::vec::byte_swap;
 
 #[must_root]
 #[derive(JSTraceable, Clone, HeapSizeOf)]
diff --git a/components/script/dom/element.rs b/components/script/dom/element.rs
index 479a73dee86..d9535663d46 100644
--- a/components/script/dom/element.rs
+++ b/components/script/dom/element.rs
@@ -75,7 +75,6 @@ use selectors::matching::{DeclarationBlock, ElementFlags, matches};
 use selectors::matching::{HAS_SLOW_SELECTOR, HAS_EDGE_CHILD_SELECTOR, HAS_SLOW_SELECTOR_LATER_SIBLINGS};
 use selectors::matching::{common_style_affecting_attributes, rare_style_affecting_attributes};
 use selectors::parser::{AttrSelector, NamespaceConstraint, parse_author_origin_selector_list_from_str};
-use smallvec::VecLike;
 use std::ascii::AsciiExt;
 use std::borrow::Cow;
 use std::cell::{Cell, Ref};
@@ -91,6 +90,7 @@ use style::properties::DeclaredValue;
 use style::properties::longhands::{self, background_image, border_spacing, font_family, overflow_x, font_size};
 use style::properties::{PropertyDeclaration, PropertyDeclarationBlock, parse_style_attribute};
 use style::selector_impl::{NonTSPseudoClass, ServoSelectorImpl};
+use style::sink::Push;
 use style::values::CSSFloat;
 use style::values::specified::{self, CSSColor, CSSRGBA, LengthOrPercentage};
 
@@ -275,7 +275,7 @@ pub trait LayoutElementHelpers {
 
     #[allow(unsafe_code)]
     unsafe fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, &mut V)
-        where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>>;
+        where V: Push<DeclarationBlock<Vec<PropertyDeclaration>>>;
     #[allow(unsafe_code)]
     unsafe fn get_colspan(self) -> u32;
     #[allow(unsafe_code)]
@@ -308,7 +308,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
 
     #[allow(unsafe_code)]
     unsafe fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V)
-        where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>>
+        where V: Push<DeclarationBlock<Vec<PropertyDeclaration>>>
     {
         #[inline]
         fn from_declaration(rule: PropertyDeclaration) -> DeclarationBlock<Vec<PropertyDeclaration>> {
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index cf814068b22..dbb774ad87b 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use canvas_traits::{CanvasCommonMsg, CanvasMsg};
+use canvas_traits::{CanvasCommonMsg, CanvasMsg, byte_swap};
 use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
 use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextMethods;
 use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::{self, WebGLContextAttributes};
@@ -40,7 +40,6 @@ use net_traits::image_cache_thread::ImageResponse;
 use offscreen_gl_context::{GLContextAttributes, GLLimits};
 use script_traits::ScriptMsg as ConstellationMsg;
 use std::cell::Cell;
-use util::vec::byte_swap;
 use webrender_traits::WebGLError::*;
 use webrender_traits::{WebGLCommand, WebGLError, WebGLFramebufferBindingRequest, WebGLParameter};
 
diff --git a/components/script/layout_wrapper.rs b/components/script/layout_wrapper.rs
index 681fdab9c46..779c37a5d52 100644
--- a/components/script/layout_wrapper.rs
+++ b/components/script/layout_wrapper.rs
@@ -49,7 +49,6 @@ use script_layout_interface::{HTMLCanvasData, LayoutNodeType, TrustedNodeAddress
 use script_layout_interface::{OpaqueStyleAndLayoutData, PartialStyleAndLayoutData};
 use selectors::matching::{DeclarationBlock, ElementFlags};
 use selectors::parser::{AttrSelector, NamespaceConstraint};
-use smallvec::VecLike;
 use std::marker::PhantomData;
 use std::mem::{transmute, transmute_copy};
 use string_cache::{Atom, BorrowedAtom, BorrowedNamespace, Namespace};
@@ -63,6 +62,7 @@ use style::refcell::{Ref, RefCell, RefMut};
 use style::restyle_hints::ElementSnapshot;
 use style::selector_impl::{NonTSPseudoClass, ServoSelectorImpl};
 use style::servo::{PrivateStyleData, SharedStyleContext};
+use style::sink::Push;
 use url::Url;
 use util::str::is_whitespace;
 
@@ -360,7 +360,7 @@ pub struct ServoLayoutElement<'le> {
 
 impl<'le> PresentationalHintsSynthetizer for ServoLayoutElement<'le> {
     fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V)
-        where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>>
+        where V: Push<DeclarationBlock<Vec<PropertyDeclaration>>>
     {
         unsafe {
             self.element.synthesize_presentational_hints_for_legacy_attributes(hints);
@@ -995,5 +995,5 @@ impl <'le> ::selectors::Element for ServoThreadSafeLayoutElement<'le> {
 
 impl<'le> PresentationalHintsSynthetizer for ServoThreadSafeLayoutElement<'le> {
     fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, _hints: &mut V)
-        where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>> {}
+        where V: Push<DeclarationBlock<Vec<PropertyDeclaration>>> {}
 }
diff --git a/components/servo/Cargo.lock b/components/servo/Cargo.lock
index b20bbe079fe..98ff10d0483 100644
--- a/components/servo/Cargo.lock
+++ b/components/servo/Cargo.lock
@@ -2231,15 +2231,19 @@ dependencies = [
  "app_units 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cssparser 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "encoding 0.2.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize_plugin 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "selectors 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2457,14 +2461,11 @@ dependencies = [
  "app_units 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.2.3 (git+https://github.com/servo/ipc-channel)",
- "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2472,7 +2473,6 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "xdg 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
diff --git a/components/style/Cargo.toml b/components/style/Cargo.toml
index 37a4bf6bb01..a90673b9e40 100644
--- a/components/style/Cargo.toml
+++ b/components/style/Cargo.toml
@@ -22,6 +22,7 @@ servo = ["serde", "serde/nightly", "serde_macros", "heapsize", "heapsize_plugin"
 app_units = "0.2.5"
 bitflags = "0.7"
 cssparser = "0.5.5"
+deque = "0.3.1"
 encoding = "0.2"
 euclid = "0.7.1"
 fnv = "1.0"
@@ -29,9 +30,11 @@ gecko_bindings = {path = "../../ports/geckolib/gecko_bindings", optional = true}
 heapsize = {version = "0.3.0", optional = true}
 heapsize_plugin = {version = "0.1.2", optional = true}
 lazy_static = "0.2"
+libc = "0.2"
 log = "0.3.5"
 matches = "0.1"
 num-traits = "0.1.32"
+rand = "0.3"
 rustc-serialize = "0.3"
 selectors = "0.6"
 serde = {version = "0.7.11", optional = true}
@@ -43,5 +46,8 @@ time = "0.1"
 url = "1.0.0"
 util = {path = "../util"}
 
+[target.'cfg(windows)'.dependencies]
+kernel32-sys = "0.2"
+
 [build-dependencies]
 walkdir = "0.1"
diff --git a/components/style/dom.rs b/components/style/dom.rs
index 4f7eeaff169..11cc5f93a0e 100644
--- a/components/style/dom.rs
+++ b/components/style/dom.rs
@@ -15,7 +15,7 @@ use restyle_hints::{ElementSnapshot, RESTYLE_DESCENDANTS, RESTYLE_LATER_SIBLINGS
 use selector_impl::{ElementExt, SelectorImplExt};
 use selectors::Element;
 use selectors::matching::DeclarationBlock;
-use smallvec::VecLike;
+use sink::Push;
 use std::ops::BitOr;
 use std::sync::Arc;
 use string_cache::{Atom, Namespace};
@@ -194,7 +194,7 @@ pub trait TDocument : Sized + Copy + Clone {
 
 pub trait PresentationalHintsSynthetizer {
     fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, hints: &mut V)
-        where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>>;
+        where V: Push<DeclarationBlock<Vec<PropertyDeclaration>>>;
 }
 
 pub trait TElement : Sized + Copy + Clone + ElementExt + PresentationalHintsSynthetizer {
diff --git a/components/style/lib.rs b/components/style/lib.rs
index ae1e8c84d7c..325c89fdd46 100644
--- a/components/style/lib.rs
+++ b/components/style/lib.rs
@@ -40,6 +40,7 @@ extern crate bitflags;
 extern crate core;
 #[macro_use]
 extern crate cssparser;
+extern crate deque;
 extern crate encoding;
 extern crate euclid;
 extern crate fnv;
@@ -49,12 +50,14 @@ extern crate gecko_bindings;
 #[allow(unused_extern_crates)]
 #[macro_use]
 extern crate lazy_static;
+extern crate libc;
 #[macro_use]
 extern crate log;
 #[allow(unused_extern_crates)]
 #[macro_use]
 extern crate matches;
 extern crate num_traits;
+extern crate rand;
 extern crate rustc_serialize;
 extern crate selectors;
 #[cfg(feature = "servo")] extern crate serde;
@@ -88,12 +91,14 @@ pub mod selector_impl;
 pub mod selector_matching;
 pub mod sequential;
 pub mod servo;
+pub mod sink;
 pub mod stylesheets;
 pub mod traversal;
 #[macro_use]
 #[allow(non_camel_case_types)]
 pub mod values;
 pub mod viewport;
+pub mod workqueue;
 
 /// The CSS properties supported by the style system.
 // Generated from the properties.mako.rs template by build.rs
diff --git a/components/style/matching.rs b/components/style/matching.rs
index 7f865cf9a72..d3dd3742d3d 100644
--- a/components/style/matching.rs
+++ b/components/style/matching.rs
@@ -17,6 +17,7 @@ use selectors::Element;
 use selectors::bloom::BloomFilter;
 use selectors::matching::{CommonStyleAffectingAttributeMode, CommonStyleAffectingAttributes};
 use selectors::matching::{common_style_affecting_attributes, rare_style_affecting_attributes};
+use sink::ForgetfulSink;
 use smallvec::SmallVec;
 use std::collections::HashMap;
 use std::hash::{BuildHasherDefault, Hash, Hasher};
@@ -26,7 +27,6 @@ use string_cache::{Atom, Namespace};
 use util::arc_ptr_eq;
 use util::cache::{LRUCache, SimpleHashCache};
 use util::opts;
-use util::vec::ForgetfulSink;
 
 fn create_common_style_affecting_attributes_from_element<E: TElement>(element: &E)
                                                          -> CommonStyleAffectingAttributes {
diff --git a/components/style/parallel.rs b/components/style/parallel.rs
index d7cb95ecac2..0bc840f7492 100644
--- a/components/style/parallel.rs
+++ b/components/style/parallel.rs
@@ -12,7 +12,7 @@ use dom::{OpaqueNode, TNode, UnsafeNode};
 use std::mem;
 use std::sync::atomic::Ordering;
 use traversal::DomTraversalContext;
-use util::workqueue::{WorkQueue, WorkUnit, WorkerProxy};
+use workqueue::{WorkQueue, WorkUnit, WorkerProxy};
 
 #[allow(dead_code)]
 fn static_assertion(node: UnsafeNode) {
diff --git a/components/style/selector_matching.rs b/components/style/selector_matching.rs
index 35a38d5ed14..74718d4b69b 100644
--- a/components/style/selector_matching.rs
+++ b/components/style/selector_matching.rs
@@ -18,6 +18,7 @@ use selectors::bloom::BloomFilter;
 use selectors::matching::DeclarationBlock as GenericDeclarationBlock;
 use selectors::matching::{Rule, SelectorMap};
 use selectors::parser::SelectorImpl;
+use sink::Push;
 use smallvec::VecLike;
 use std::collections::HashMap;
 use std::hash::BuildHasherDefault;
@@ -389,7 +390,7 @@ impl<Impl: SelectorImplExt> Stylist<Impl> {
                                         applicable_declarations: &mut V)
                                         -> bool
                                         where E: Element<Impl=Impl> + PresentationalHintsSynthetizer,
-                                              V: VecLike<DeclarationBlock> {
+                                              V: Push<DeclarationBlock> + VecLike<DeclarationBlock> {
         assert!(!self.is_device_dirty);
         assert!(style_attribute.is_none() || pseudo_element.is_none(),
                 "Style attributes do not apply to pseudo-elements");
@@ -430,7 +431,8 @@ impl<Impl: SelectorImplExt> Stylist<Impl> {
         // Step 4: Normal style attributes.
         style_attribute.map(|sa| {
             shareable = false;
-            applicable_declarations.push(
+            Push::push(
+                applicable_declarations,
                 GenericDeclarationBlock::from_declarations(sa.normal.clone()))
         });
 
@@ -443,7 +445,8 @@ impl<Impl: SelectorImplExt> Stylist<Impl> {
         // Step 6: `!important` style attributes.
         style_attribute.map(|sa| {
             shareable = false;
-            applicable_declarations.push(
+            Push::push(
+                applicable_declarations,
                 GenericDeclarationBlock::from_declarations(sa.important.clone()))
         });
 
diff --git a/components/style/sink.rs b/components/style/sink.rs
new file mode 100644
index 00000000000..33aa26ac1af
--- /dev/null
+++ b/components/style/sink.rs
@@ -0,0 +1,40 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use smallvec::{Array, SmallVec};
+use std::marker::PhantomData;
+
+pub trait Push<T> {
+    fn push(&mut self, value: T);
+}
+
+impl<T> Push<T> for Vec<T> {
+    fn push(&mut self, value: T) {
+        Vec::push(self, value);
+    }
+}
+
+impl<A: Array> Push<A::Item> for SmallVec<A> {
+    fn push(&mut self, value: A::Item) {
+        SmallVec::push(self, value);
+    }
+}
+
+pub struct ForgetfulSink<T>(bool, PhantomData<T>);
+
+impl<T> ForgetfulSink<T> {
+    pub fn new() -> Self {
+        ForgetfulSink(true, PhantomData)
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.0
+    }
+}
+
+impl<T> Push<T> for ForgetfulSink<T> {
+    fn push(&mut self, _value: T) {
+        self.0 = false;
+    }
+}
diff --git a/components/util/workqueue.rs b/components/style/workqueue.rs
index ebc85df466f..acee9faf5f8 100644
--- a/components/util/workqueue.rs
+++ b/components/style/workqueue.rs
@@ -7,6 +7,8 @@
 //! Data associated with queues is simply a pair of unsigned integers. It is expected that a
 //! higher-level API on top of this could allow safe fork-join parallelism.
 
+#![allow(unsafe_code)]
+
 #[cfg(windows)]
 extern crate kernel32;
 
@@ -16,8 +18,8 @@ use libc::usleep;
 use rand::{Rng, XorShiftRng, weak_rng};
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::mpsc::{Receiver, Sender, channel};
-use thread::spawn_named;
-use thread_state;
+use util::thread::spawn_named;
+use util::thread_state;
 
 /// A unit of work.
 ///
diff --git a/components/util/Cargo.toml b/components/util/Cargo.toml
index 83b23c78c87..8f8b26bcae2 100644
--- a/components/util/Cargo.toml
+++ b/components/util/Cargo.toml
@@ -17,13 +17,11 @@ servo = ["serde", "serde_macros", "backtrace", "ipc-channel", "app_units/plugins
 app_units = "0.2.5"
 backtrace = {version = "0.2.1", optional = true}
 bitflags = "0.7"
-deque = "0.3.1"
 euclid = "0.7.1"
 getopts = "0.2.11"
 heapsize = "0.3.0"
 ipc-channel = {git = "https://github.com/servo/ipc-channel", optional = true}
 lazy_static = "0.2"
-libc = "0.2"
 log = "0.3.5"
 num_cpus = "0.2.2"
 num-traits = "0.1.32"
@@ -31,11 +29,7 @@ rand = "0.3"
 rustc-serialize = "0.3"
 serde = {version = "0.7.11", optional = true}
 serde_macros = {version = "0.7.11", optional = true}
-smallvec = "0.1"
 url = "1.0.0"
 
 [target.'cfg(all(unix, not(target_os = "macos"), not(target_os = "ios"), not(target_os = "android")))'.dependencies]
 xdg = "2.0"
-
-[target.'cfg(windows)'.dependencies]
-kernel32-sys = "0.2"
diff --git a/components/util/debug_utils.rs b/components/util/debug_utils.rs
deleted file mode 100644
index 631c7dad4ca..00000000000
--- a/components/util/debug_utils.rs
+++ /dev/null
@@ -1,33 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use std::io::{self, Write};
-use std::mem;
-use std::mem::size_of;
-use std::slice;
-
-fn hexdump_slice(buf: &[u8]) {
-    let mut stderr = io::stderr();
-    stderr.write_all(b"    ").unwrap();
-    for (i, &v) in buf.iter().enumerate() {
-        let output = format!("{:02X} ", v);
-        stderr.write_all(output.as_bytes()).unwrap();
-        match i % 16 {
-            15 => { stderr.write_all(b"\n    ").unwrap(); },
-             7 => { stderr.write_all(b"   ").unwrap(); },
-             _ => ()
-        }
-        stderr.flush().unwrap();
-    }
-    stderr.write_all(b"\n").unwrap();
-}
-
-pub fn hexdump<T>(obj: &T) {
-    unsafe {
-        let buf: *const u8 = mem::transmute(obj);
-        debug!("dumping at {:p}", buf);
-        let from_buf = slice::from_raw_parts(buf, size_of::<T>());
-        hexdump_slice(from_buf);
-    }
-}
diff --git a/components/util/lib.rs b/components/util/lib.rs
index 84c86a982ed..fed8c9b0178 100644
--- a/components/util/lib.rs
+++ b/components/util/lib.rs
@@ -14,20 +14,17 @@
 extern crate app_units;
 #[cfg(feature = "servo")] extern crate backtrace;
 #[allow(unused_extern_crates)] #[macro_use] extern crate bitflags;
-extern crate deque;
 extern crate euclid;
 extern crate getopts;
 #[macro_use] extern crate heapsize;
 #[cfg(feature = "servo")] extern crate ipc_channel;
 #[allow(unused_extern_crates)] #[macro_use] extern crate lazy_static;
-extern crate libc;
 #[macro_use] extern crate log;
 extern crate num_cpus;
 extern crate num_traits;
 extern crate rand;
 extern crate rustc_serialize;
 #[cfg(feature = "servo")] extern crate serde;
-extern crate smallvec;
 extern crate url;
 #[cfg(all(unix, not(target_os = "macos"), not(target_os = "ios"), not(target_os = "android")))]
 extern crate xdg;
@@ -36,20 +33,16 @@ use std::sync::Arc;
 
 pub mod basedir;
 pub mod cache;
-#[allow(unsafe_code)] pub mod debug_utils;
 pub mod geometry;
 #[cfg(feature = "servo")] #[allow(unsafe_code)] pub mod ipc;
 #[allow(unsafe_code)] pub mod opts;
 #[cfg(feature = "servo")] pub mod panicking;
 pub mod prefs;
-#[cfg(feature = "servo")] pub mod print_tree;
 pub mod resource_files;
 pub mod str;
 pub mod thread;
 pub mod thread_state;
 pub mod tid;
-pub mod vec;
-#[allow(unsafe_code)] pub mod workqueue;
 
 #[cfg(feature = "servo")]
 #[allow(unsafe_code)]
diff --git a/components/util/vec.rs b/components/util/vec.rs
deleted file mode 100644
index 639e1c260da..00000000000
--- a/components/util/vec.rs
+++ /dev/null
@@ -1,87 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use std::marker::PhantomData;
-use std::ops;
-use super::smallvec::VecLike;
-
-// TODO(pcwalton): Speed up with SIMD, or better yet, find some way to not do this.
-pub fn byte_swap(data: &mut [u8]) {
-    let length = data.len();
-    // FIXME(rust #27741): Range::step_by is not stable yet as of this writing.
-    let mut i = 0;
-    while i < length {
-        let r = data[i + 2];
-        data[i + 2] = data[i + 0];
-        data[i + 0] = r;
-        i += 4;
-    }
-}
-
-/// A `VecLike` that only tracks whether or not something was ever pushed to it.
-pub struct ForgetfulSink<T> {
-    empty: bool,
-    _data: PhantomData<T>,
-}
-
-impl<T> ForgetfulSink<T> {
-    pub fn new() -> ForgetfulSink<T> {
-        ForgetfulSink {
-            empty: true,
-            _data: PhantomData,
-        }
-    }
-
-    pub fn is_empty(&self) -> bool {
-        self.empty
-    }
-}
-
-impl<T> ops::Deref for ForgetfulSink<T> {
-    type Target = [T];
-    fn deref(&self) -> &[T] {
-        unreachable!()
-    }
-}
-
-impl<T> ops::DerefMut for ForgetfulSink<T> {
-    fn deref_mut(&mut self) -> &mut [T] {
-        unreachable!()
-    }
-}
-
-macro_rules! impl_index {
-    ($index_type: ty, $output_type: ty) => {
-        impl<T> ops::Index<$index_type> for ForgetfulSink<T> {
-            type Output = $output_type;
-            fn index(&self, _index: $index_type) -> &$output_type {
-                unreachable!()
-            }
-        }
-
-        impl<T> ops::IndexMut<$index_type> for ForgetfulSink<T> {
-            fn index_mut(&mut self, _index: $index_type) -> &mut $output_type {
-                unreachable!()
-            }
-        }
-    }
-}
-
-impl_index!(usize, T);
-impl_index!(ops::Range<usize>, [T]);
-impl_index!(ops::RangeFrom<usize>, [T]);
-impl_index!(ops::RangeTo<usize>, [T]);
-impl_index!(ops::RangeFull, [T]);
-
-impl<T> VecLike<T> for ForgetfulSink<T> {
-    #[inline]
-    fn len(&self) -> usize {
-        unreachable!()
-    }
-
-    #[inline]
-    fn push(&mut self, _value: T) {
-        self.empty = false;
-    }
-}
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
index b5c53fda964..22f9af94530 100644
--- a/ports/cef/Cargo.lock
+++ b/ports/cef/Cargo.lock
@@ -2116,15 +2116,19 @@ dependencies = [
  "app_units 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cssparser 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "encoding 0.2.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize_plugin 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "selectors 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2326,14 +2330,11 @@ dependencies = [
  "app_units 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.2.3 (git+https://github.com/servo/ipc-channel)",
- "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2341,7 +2342,6 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "xdg 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
diff --git a/ports/geckolib/Cargo.lock b/ports/geckolib/Cargo.lock
index 7b94768e030..c3a78c1ecca 100644
--- a/ports/geckolib/Cargo.lock
+++ b/ports/geckolib/Cargo.lock
@@ -450,16 +450,20 @@ dependencies = [
  "app_units 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cssparser 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "encoding 0.2.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "gecko_bindings 0.0.1",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize_plugin 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "selectors 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -562,14 +566,11 @@ dependencies = [
  "app_units 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "deque 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "ipc-channel 0.2.4 (git+https://github.com/servo/ipc-channel)",
- "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -577,7 +578,6 @@ dependencies = [
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "xdg 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
diff --git a/ports/geckolib/data.rs b/ports/geckolib/data.rs
index 9b2698409c9..1962243a310 100644
--- a/ports/geckolib/data.rs
+++ b/ports/geckolib/data.rs
@@ -14,9 +14,9 @@ use std::sync::{Arc, RwLock};
 use style::dom::OpaqueNode;
 use style::media_queries::{Device, MediaType};
 use style::parallel::WorkQueueData;
+use style::workqueue::WorkQueue;
 use util::geometry::ViewportPx;
 use util::thread_state;
-use util::workqueue::WorkQueue;
 
 pub struct PerDocumentStyleData {
     /// Rule processor.
diff --git a/ports/geckolib/wrapper.rs b/ports/geckolib/wrapper.rs
index 83dbac01064..2c32643c008 100644
--- a/ports/geckolib/wrapper.rs
+++ b/ports/geckolib/wrapper.rs
@@ -50,6 +50,7 @@ use style::properties::{PropertyDeclaration, PropertyDeclarationBlock};
 use style::refcell::{Ref, RefCell, RefMut};
 use style::restyle_hints::ElementSnapshot;
 use style::selector_impl::ElementExt;
+use style::sink::Push;
 #[allow(unused_imports)] // Used in commented-out code.
 use url::Url;
 
@@ -377,7 +378,7 @@ impl<'le> TElement for GeckoElement<'le> {
 
 impl<'le> PresentationalHintsSynthetizer for GeckoElement<'le> {
     fn synthesize_presentational_hints_for_legacy_attributes<V>(&self, _hints: &mut V)
-        where V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>>
+        where V: Push<DeclarationBlock<Vec<PropertyDeclaration>>>
     {
         // FIXME(bholley) - Need to implement this.
     }