cc: Change Tile::tile_size_ from a Rect to a Size.

cc/resources/tile.h

 // Copyright 2012 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_RESOURCES_TILE_H_
 #define CC_RESOURCES_TILE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 120 matching lines @@
 
   void set_picture_pile(scoped_refptr<PicturePileImpl> pile) {
     DCHECK(pile->CanRaster(contents_scale_, content_rect_))
         << gfx::ScaleToEnclosingRect(content_rect_, 1.f / contents_scale_)
                .ToString();
     picture_pile_ = pile;
   }
 
   size_t GPUMemoryUsageInBytes() const;
 
-  gfx::Size size() const { return tile_size_.size(); }
+  gfx::Size size() const { return size_; }
 
   RasterMode DetermineRasterModeForTree(WhichTree tree) const;
   RasterMode DetermineOverallRasterMode() const;
 
   // Functionality used in tests.
   RasterMode GetRasterModeForTesting() const {
     return managed_state().raster_mode;
   }
   ManagedTileState::TileVersion& GetTileVersionForTesting(RasterMode mode) {
     return managed_state_.tile_versions[mode];
@@ skipping 19 matching lines @@
   ~Tile();
 
   ManagedTileState& managed_state() { return managed_state_; }
   const ManagedTileState& managed_state() const { return managed_state_; }
   RasterMode DetermineRasterModeForResolution(TileResolution resolution) const;
 
   bool HasRasterTask() const;
 
   TileManager* tile_manager_;
   scoped_refptr<PicturePileImpl> picture_pile_;
-  gfx::Rect tile_size_;
+  gfx::Size size_;
   gfx::Rect content_rect_;
   float contents_scale_;
   gfx::Rect opaque_rect_;
   bool is_occluded_[NUM_TREES];
 
   TilePriority priority_[NUM_TREES];
   ManagedTileState managed_state_;
   int layer_id_;
   int source_frame_number_;
   int flags_;
 
   Id id_;
   static Id s_next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Tile);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_H_