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

cc/base/tiling_data.cc

 // 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.
 
 #include "cc/base/tiling_data.h"
 
 #include <algorithm>
 
 #include "ui/gfx/rect.h"
 #include "ui/gfx/vector2d.h"
@@ skipping 11 matching lines @@
                            (max_texture_size - 2 * border_texels));
   return total_size > 0 ? num_tiles : 0;
 }
 
 TilingData::TilingData()
     : border_texels_(0) {
   RecomputeNumTiles();
 }
 
 TilingData::TilingData(
-    const gfx::Size& max_texture_size,
-    const gfx::Size& total_size,
+    gfx::Size max_texture_size,
+    gfx::Size total_size,
     bool has_border_texels)
     : max_texture_size_(max_texture_size),
       total_size_(total_size),
       border_texels_(has_border_texels ? 1 : 0) {
   RecomputeNumTiles();
 }
 
 TilingData::TilingData(
-    const gfx::Size& max_texture_size,
-    const gfx::Size& total_size,
+    gfx::Size max_texture_size,
+    gfx::Size total_size,
     int border_texels)
     : max_texture_size_(max_texture_size),
       total_size_(total_size),
       border_texels_(border_texels) {
   RecomputeNumTiles();
 }
 
-void TilingData::SetTotalSize(const gfx::Size& total_size) {
+void TilingData::SetTotalSize(gfx::Size total_size) {
   total_size_ = total_size;
   RecomputeNumTiles();
 }
 
-void TilingData::SetMaxTextureSize(const gfx::Size& max_texture_size) {
+void TilingData::SetMaxTextureSize(gfx::Size max_texture_size) {
   max_texture_size_ = max_texture_size;
   RecomputeNumTiles();
 }
 
 void TilingData::SetHasBorderTexels(bool has_border_texels) {
   border_texels_ = has_border_texels ? 1 : 0;
   RecomputeNumTiles();
 }
 
 void TilingData::SetBorderTexels(int border_texels) {
@@ skipping 336 matching lines @@
     }
 
     if (index_y_ > consider_bottom_)
       done();
   }
 
   return *this;
 }
 
 }  // namespace cc