1 files changed, 20 insertions, 4 deletions
diff --git a/components/layout_2020/flow/root.rs b/components/layout_2020/flow/root.rs
index ba473abc410..54cc1eef07f 100644
--- a/components/layout_2020/flow/root.rs
+++ b/components/layout_2020/flow/root.rs
@@ -2,11 +2,12 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+use crate::display_list::IsContentful;
 use crate::dom_traversal::{Contents, NodeExt};
 use crate::flow::construct::ContainsFloats;
 use crate::flow::float::FloatBox;
 use crate::flow::{BlockContainer, BlockFormattingContext, BlockLevelBox};
-use crate::fragments::{Fragment, IsContentful};
+use crate::fragments::Fragment;
 use crate::geom;
 use crate::geom::flow_relative::Vec2;
 use crate::positioned::AbsolutelyPositionedBox;
@@ -20,8 +21,8 @@ use servo_arc::Arc;
 use style::context::SharedStyleContext;
 use style::properties::ComputedValues;
 use style::values::computed::{Length, LengthOrAuto};
+use style::Zero;
 use style_traits::CSSPixel;
-use webrender_api::DisplayListBuilder;
 
 pub struct BoxTreeRoot(BlockFormattingContext);
 pub struct FragmentTreeRoot(Vec<Fragment>);
@@ -132,10 +133,25 @@ impl BoxTreeRoot {
 }
 
 impl FragmentTreeRoot {
-    pub fn build_display_list(&self, builder: &mut DisplayListBuilder) -> IsContentful {
+    pub fn build_display_list(
+        &self,
+        builder: &mut crate::display_list::DisplayListBuilder,
+        pipeline_id: msg::constellation_msg::PipelineId,
+        viewport_size: webrender_api::units::LayoutSize,
+    ) -> IsContentful {
+        let containing_block = geom::physical::Rect {
+            top_left: geom::physical::Vec2 {
+                x: Length::zero(),
+                y: Length::zero(),
+            },
+            size: geom::physical::Vec2 {
+                x: Length::new(viewport_size.width),
+                y: Length::new(viewport_size.height),
+            },
+        };
         let mut is_contentful = IsContentful(false);
         for fragment in &self.0 {
-            fragment.build_display_list(builder, &mut is_contentful)
+            fragment.build_display_list(builder, &mut is_contentful, &containing_block)
         }
         is_contentful
     }