cc: Add tile pool to tile manager.

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 86 matching lines @@
 
   size_t GPUMemoryUsageInBytes() const;
 
   RasterMode GetRasterModeForTesting() const {
     return managed_state().raster_mode;
   }
   ManagedTileState::TileVersion& GetTileVersionForTesting(RasterMode mode) {
     return managed_state_.tile_versions[mode];
   }
 
-  gfx::Size size() const { return tile_size_.size(); }
+  gfx::Size size() const { return tile_size_; }
 
  private:
   friend class TileManager;
   friend class PrioritizedTileSet;
   friend class FakeTileManager;
   friend class BinComparator;
 
   // Methods called by by tile manager.
-  Tile(TileManager* tile_manager,
-       PicturePileImpl* picture_pile,
-       gfx::Size tile_size,
-       gfx::Rect content_rect,
-       gfx::Rect opaque_rect,
-       float contents_scale,
-       int layer_id,
-       int source_frame_number,
-       bool can_use_lcd_text);
+  explicit Tile(TileManager* tile_manager);
   ~Tile();
 
+  void Reset(PicturePileImpl* picture_pile,
+             gfx::Size tile_size,
+             gfx::Rect content_rect,
+             gfx::Rect opaque_rect,
+             float contents_scale,
+             int layer_id,
+             int source_frame_number,
+             bool can_use_lcd_text);
+
   ManagedTileState& managed_state() { return managed_state_; }
   const ManagedTileState& managed_state() const { return managed_state_; }
+  void reset_picture_pile() { picture_pile_ = NULL; }
 
   TileManager* tile_manager_;
   scoped_refptr<PicturePileImpl> picture_pile_;
-  gfx::Rect tile_size_;
+  gfx::Size tile_size_;
   gfx::Rect content_rect_;
   float contents_scale_;
   gfx::Rect opaque_rect_;
 
   TilePriority priority_[NUM_TREES];
   ManagedTileState managed_state_;
   int layer_id_;
   int source_frame_number_;
   bool can_use_lcd_text_;
 
   Id id_;
   static Id s_next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Tile);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_H_