cc: Apply contents scales to impl-side painting rasterization

cc/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_TILE_H_
 #define CC_TILE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "cc/layer_tree_host_impl.h"
 #include "cc/picture_pile_impl.h"
 #include "cc/resource_provider.h"
 #include "cc/tile_manager.h"
 #include "cc/tile_priority.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 class Tile;
 
 class CC_EXPORT Tile : public base::RefCounted<Tile> {
  public:
   Tile(TileManager* tile_manager,
        PicturePileImpl* picture_pile,
        gfx::Size tile_size,
        GLenum format,
-       gfx::Rect rect_inside_picture);
+       gfx::Rect rect_inside_picture,
+       float contents_scale);
 
   const PicturePileImpl* picture_pile() const {
     return picture_pile_.get();
   }
 
   const TilePriority& priority(WhichTree tree) const {
     return priority_[tree];
   }
 
   TilePriority combined_priority() const {
@@ skipping 10 matching lines @@
 
   bool contents_swizzled() const { return managed_state_.contents_swizzled; }
 
  private:
   // Methods called by by tile manager.
   friend class TileManager;
   friend class BinComparator;
   ManagedTileState& managed_state() { return managed_state_; }
   const ManagedTileState& managed_state() const { return managed_state_; }
   size_t bytes_consumed_if_allocated() const;
+  float contents_scale() const { return contents_scale_; }
 
   // Normal private methods.
   friend class base::RefCounted<Tile>;
   ~Tile();
 
   TileManager* tile_manager_;
   scoped_refptr<PicturePileImpl> picture_pile_;
   gfx::Rect tile_size_;
   GLenum format_;
   gfx::Rect rect_inside_picture_;
+  float contents_scale_;
   gfx::Rect opaque_rect_;
 
   TilePriority priority_[2];
   ManagedTileState managed_state_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILE_H_