Fix for performance regression on high dpi devices.

third_party/WebKit/Source/core/style/ComputedStyle.cpp

Index: third_party/WebKit/Source/core/style/ComputedStyle.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.cpp b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
index 5ee3f334ad1f134cde7815fa0ea7f2ad23faa902..12a1ffac605679b1800ce9203b106515813337db 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -1490,7 +1490,9 @@ FloatRoundedRect ComputedStyle::getRoundedInnerBorderFor(
     bool includeLogicalRightEdge) const {
   LayoutRect innerRect(borderRect);
   innerRect.expand(insets);
-  innerRect.size().clampNegativeToZero();
+  LayoutSize innerRectSize = innerRect.size();
+  innerRectSize.clampNegativeToZero();
+  innerRect.setSize(innerRectSize);
 
   FloatRoundedRect roundedRect(pixelSnappedIntRect(innerRect));