Split StyleSurroundData::margin into four individual Lengths.

third_party/WebKit/Source/platform/LengthBox.cpp

Index: third_party/WebKit/Source/platform/LengthBox.cpp
diff --git a/third_party/WebKit/Source/platform/LengthBox.cpp b/third_party/WebKit/Source/platform/LengthBox.cpp
index af0f27191c4766f7ecec07e92bccaf452820df21..a78defdd4536ca8b574776be2850778dd8e9cfbd 100644
--- a/third_party/WebKit/Source/platform/LengthBox.cpp
+++ b/third_party/WebKit/Source/platform/LengthBox.cpp
@@ -76,6 +76,40 @@ const Length& LengthBox::After(WritingMode writing_mode,
   return bottom;
 }
 
+const Length& LengthBox::Start(WritingMode writing_mode,
+                               TextDirection direction,
+                               const Length& top,
+                               const Length& left,
+                               const Length& right,
+                               const Length& bottom) {
+  if (IsHorizontalWritingMode(writing_mode))
+    return IsLeftToRightDirection(direction) ? left : right;
+  return IsLeftToRightDirection(direction) ? top : bottom;
+}
+
+const Length& LengthBox::End(WritingMode writing_mode,
+                             TextDirection direction,
+                             const Length& top,
+                             const Length& left,
+                             const Length& right,
+                             const Length& bottom) {
+  if (IsHorizontalWritingMode(writing_mode))
+    return IsLeftToRightDirection(direction) ? right : left;
+  return IsLeftToRightDirection(direction) ? bottom : top;
+}
+
+const Length& LengthBox::Over(WritingMode writing_mode,
+                              const Length& top,
+                              const Length& right) {
+  return IsHorizontalWritingMode(writing_mode) ? top : right;
+}
+
+const Length& LengthBox::Under(WritingMode writing_mode,
+                               const Length& bottom,
+                               const Length& left) {
+  return IsHorizontalWritingMode(writing_mode) ? bottom : left;
+}
+
 const Length& LengthBox::LogicalLeft(WritingMode writing_mode) const {
   return LengthBox::LogicalLeft(writing_mode, left_, top_);
 }
@@ -94,24 +128,21 @@ const Length& LengthBox::After(WritingMode writing_mode) const {
 
 const Length& LengthBox::Start(WritingMode writing_mode,
                                TextDirection direction) const {
-  if (IsHorizontalWritingMode(writing_mode))
-    return IsLeftToRightDirection(direction) ? left_ : right_;
-  return IsLeftToRightDirection(direction) ? top_ : bottom_;
+  return LengthBox::Start(writing_mode, direction, top_, left_, right_,
+                          bottom_);
 }
 
 const Length& LengthBox::end(WritingMode writing_mode,
                              TextDirection direction) const {
-  if (IsHorizontalWritingMode(writing_mode))
-    return IsLeftToRightDirection(direction) ? right_ : left_;
-  return IsLeftToRightDirection(direction) ? bottom_ : top_;
+  return LengthBox::End(writing_mode, direction, top_, left_, right_, bottom_);
 }
 
 const Length& LengthBox::Over(WritingMode writing_mode) const {
-  return IsHorizontalWritingMode(writing_mode) ? top_ : right_;
+  return LengthBox::Over(writing_mode, top_, right_);
 }
 
 const Length& LengthBox::Under(WritingMode writing_mode) const {
-  return IsHorizontalWritingMode(writing_mode) ? bottom_ : left_;
+  return LengthBox::Under(writing_mode, bottom_, left_);
 }
 
 }  // namespace blink