Introduce CSSPixelLength and update NonNegativeLength.

First, we define computed::CSSPixelLength which contains a CSSFloat, a
pixel value, and then we replace computed::Length with CSSPixelLength.
Therefore, the |ComputedValue| of NoCalcLength, AbsoluteLength,
FontRelativeLength, ViewportPercentageLength, CharacterWidth, and
PhysicalLength is CSSPixelLength.

Besides, we drop NonNegativeAu, and replace computed::NonNegativeLength
with NonNegative<computed::Length>. (i.e. NonNegative<CSSPixelLength>)

1 files changed, 4 insertions, 5 deletions

diff --git a/components/layout/construct.rs b/components/layout/construct.rs
index 502f21b36f9..852f16e893e 100644
--- a/components/layout/construct.rs
+++ b/components/layout/construct.rs
@@ -14,7 +14,6 @@
 #![deny(unsafe_code)]
 
 use ServoArc;
-use app_units::Au;
 use block::BlockFlow;
 use context::{LayoutContext, with_thread_local_font_context};
 use data::{HAS_NEWLY_CONSTRUCTED_FLOW, LayoutData};
@@ -1852,10 +1851,10 @@ impl ComputedValueUtils for ComputedValues {
            !padding.padding_right.is_definitely_zero() ||
            !padding.padding_bottom.is_definitely_zero() ||
            !padding.padding_left.is_definitely_zero() ||
-           border.border_top_width.0 != Au(0) ||
-           border.border_right_width.0 != Au(0) ||
-           border.border_bottom_width.0 != Au(0) ||
-           border.border_left_width.0 != Au(0)
+           border.border_top_width.px() != 0. ||
+           border.border_right_width.px() != 0. ||
+           border.border_bottom_width.px() != 0. ||
+           border.border_left_width.px() != 0.
     }
 }