Support subpixel layout for borders.

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 1b5ca74b866fff9cd404898b17106bbdb63c959f..48293a5c3e7757534abded7a4dade5b20a13f739 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -63,7 +63,7 @@ namespace blink {
 
 struct SameSizeAsBorderValue {
   RGBA32 m_color;
-  unsigned m_width;
+  unsigned m_bitfield;
 };
 
 ASSERT_SIZE(BorderValue, SameSizeAsBorderValue);
@@ -2222,7 +2222,7 @@ const BorderValue& ComputedStyle::borderEnd() const {
   return isLeftToRightDirection() ? borderBottom() : borderTop();
 }
 
-int ComputedStyle::borderBeforeWidth() const {
+float ComputedStyle::borderBeforeWidth() const {
   switch (getWritingMode()) {
     case WritingMode::kHorizontalTb:
       return borderTopWidth();
@@ -2235,7 +2235,7 @@ int ComputedStyle::borderBeforeWidth() const {
   return borderTopWidth();
 }
 
-int ComputedStyle::borderAfterWidth() const {
+float ComputedStyle::borderAfterWidth() const {
   switch (getWritingMode()) {
     case WritingMode::kHorizontalTb:
       return borderBottomWidth();
@@ -2248,23 +2248,23 @@ int ComputedStyle::borderAfterWidth() const {
   return borderBottomWidth();
 }
 
-int ComputedStyle::borderStartWidth() const {
+float ComputedStyle::borderStartWidth() const {
   if (isHorizontalWritingMode())
     return isLeftToRightDirection() ? borderLeftWidth() : borderRightWidth();
   return isLeftToRightDirection() ? borderTopWidth() : borderBottomWidth();
 }
 
-int ComputedStyle::borderEndWidth() const {
+float ComputedStyle::borderEndWidth() const {
   if (isHorizontalWritingMode())
     return isLeftToRightDirection() ? borderRightWidth() : borderLeftWidth();
   return isLeftToRightDirection() ? borderBottomWidth() : borderTopWidth();
 }
 
-int ComputedStyle::borderOverWidth() const {
+float ComputedStyle::borderOverWidth() const {
   return isHorizontalWritingMode() ? borderTopWidth() : borderRightWidth();
 }
 
-int ComputedStyle::borderUnderWidth() const {
+float ComputedStyle::borderUnderWidth() const {
   return isHorizontalWritingMode() ? borderBottomWidth() : borderLeftWidth();
 }