Split StyleSurroundData::padding into four individual Lengths.

third_party/WebKit/Source/platform/Theme.h

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 97 matching lines @@
   // Returns the minimum size for a control in zoomed coordinates.
   virtual LengthSize MinimumControlSize(ControlPart,
                                         const FontDescription&,
                                         float /*zoomFactor*/) const {
     return LengthSize(Length(0, kFixed), Length(0, kFixed));
   }
 
   // Allows the theme to modify the existing padding/border.
   virtual LengthBox ControlPadding(ControlPart,
                                    const FontDescription&,
-                                   const LengthBox& zoomed_box,
+                                   const Length& zoomed_box_top,
+                                   const Length& zoomed_box_right,
+                                   const Length& zoomed_box_bottom,
+                                   const Length& zoomed_box_left,
                                    float zoom_factor) const;
   virtual LengthBox ControlBorder(ControlPart,
                                   const FontDescription&,
                                   const LengthBox& zoomed_box,
                                   float zoom_factor) const;
 
   // Whether or not whitespace: pre should be forced on always.
   virtual bool ControlRequiresPreWhiteSpace(ControlPart) const { return false; }
 
   // Method for painting a control. The rect is in zoomed coordinates.
@@ skipping 15 matching lines @@
  private:
   mutable Color active_selection_color_;
   mutable Color inactive_selection_color_;
 };
 
 PLATFORM_EXPORT Theme* PlatformTheme();
 
 }  // namespace blink
 
 #endif  // Theme_h