Support subpixel layout for borders.

third_party/WebKit/Source/core/paint/BoxPainter.cpp

Index: third_party/WebKit/Source/core/paint/BoxPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/BoxPainter.cpp b/third_party/WebKit/Source/core/paint/BoxPainter.cpp
index e27b590d4d9b9a34d3427d59e66c839501569849..2e8a79b3225219ee154d28640ee59235f694afe4 100644
--- a/third_party/WebKit/Source/core/paint/BoxPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/BoxPainter.cpp
@@ -370,10 +370,10 @@ FloatRoundedRect backgroundRoundedRectAdjustedForBleedAvoidance(
       }
     }
 
-    FloatRectOutsets insets(-fractionalInset * edges[BSTop].width,
-                            -fractionalInset * edges[BSRight].width,
-                            -fractionalInset * edges[BSBottom].width,
-                            -fractionalInset * edges[BSLeft].width);
+    FloatRectOutsets insets(-fractionalInset * edges[BSTop].width(),
+                            -fractionalInset * edges[BSRight].width(),
+                            -fractionalInset * edges[BSBottom].width(),
+                            -fractionalInset * edges[BSLeft].width());
 
     FloatRoundedRect backgroundRoundedRect = getBackgroundRoundedRect(
         obj, borderRect, box, boxSize.width(), boxSize.height(),
@@ -656,8 +656,8 @@ void BoxPainter::paintFillLayer(const LayoutBoxModelObject& obj,
     clipToBorder.emplace(obj, paintInfo, rect, border, ApplyToContext);
   }
 
-  int bLeft = info.includeLeftEdge ? obj.borderLeft() : 0;
-  int bRight = info.includeRightEdge ? obj.borderRight() : 0;
+  LayoutUnit bLeft = info.includeLeftEdge ? obj.borderLeft() : LayoutUnit();
+  LayoutUnit bRight = info.includeRightEdge ? obj.borderRight() : LayoutUnit();
   LayoutUnit pLeft = info.includeLeftEdge ? obj.paddingLeft() : LayoutUnit();
   LayoutUnit pRight = info.includeRightEdge ? obj.paddingRight() : LayoutUnit();