[#7] Pass gfx structs by const ref (gfx::Size)

cc/base/tiling_data.h

 // Copyright 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_BASE_TILING_DATA_H_
 #define CC_BASE_TILING_DATA_H_
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "cc/base/cc_export.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 class Vector2d;
 }
 
 namespace cc {
 
 class CC_EXPORT TilingData {
  public:
   TilingData();
   TilingData(
-      gfx::Size max_texture_size,
-      gfx::Size total_size,
+      const gfx::Size& max_texture_size,
+      const gfx::Size& total_size,
       bool has_border_texels);
   TilingData(
-      gfx::Size max_texture_size,
-      gfx::Size total_size,
+      const gfx::Size& max_texture_size,
+      const gfx::Size& total_size,
       int border_texels);
 
   gfx::Size total_size() const { return total_size_; }
-  void SetTotalSize(const gfx::Size total_size);
+  void SetTotalSize(const gfx::Size& total_size);
 
   gfx::Size max_texture_size() const { return max_texture_size_; }
-  void SetMaxTextureSize(gfx::Size max_texture_size);
+  void SetMaxTextureSize(const gfx::Size& max_texture_size);
 
   int border_texels() const { return border_texels_; }
   void SetHasBorderTexels(bool has_border_texels);
   void SetBorderTexels(int border_texels);
 
   bool has_empty_bounds() const { return !num_tiles_x_ || !num_tiles_y_; }
   int num_tiles_x() const { return num_tiles_x_; }
   int num_tiles_y() const { return num_tiles_y_; }
   // Return the tile index whose non-border texels include src_position.
   int TileXIndexFromSrcCoord(int src_position) const;
@@ skipping 90 matching lines @@
   int border_texels_;
 
   // These are computed values.
   int num_tiles_x_;
   int num_tiles_y_;
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_TILING_DATA_H_