Split StyleSurroundData::margin into four individual Lengths.

third_party/WebKit/Source/platform/LengthBox.cpp

 /*
  * Copyright (c) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
       return bottom;
     case WritingMode::kVerticalLr:
       return right;
     case WritingMode::kVerticalRl:
       return left;
   }
   NOTREACHED();
   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_);
 }
 
 const Length& LengthBox::LogicalRight(WritingMode writing_mode) const {
   return LengthBox::LogicalRight(writing_mode, right_, bottom_);
 }
 
 const Length& LengthBox::Before(WritingMode writing_mode) const {
   return LengthBox::Before(writing_mode, top_, left_, right_);
 }
 
 const Length& LengthBox::After(WritingMode writing_mode) const {
   return LengthBox::After(writing_mode, bottom_, left_, right_);
 }
 
 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