cc: Use asynchronous set pixels API for impl-side painting.

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"
@@ skipping 27 matching lines @@
   }
 
   TilePriority combined_priority() const {
     return TilePriority(priority_[ACTIVE_TREE],
                         priority_[PENDING_TREE]);
   }
 
   void set_priority(WhichTree tree, const TilePriority& priority);
 
   // Returns 0 if not drawable.
-  ResourceProvider::ResourceId resource_id() const {
-    return managed_state_.resource ? managed_state_.resource->id() : 0;
-  }
+  ResourceProvider::ResourceId GetResourceId() const;
 
   const gfx::Rect& opaque_rect() const { return opaque_rect_; }
 
   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_; }
@@ skipping 13 matching lines @@
   float contents_scale_;
   gfx::Rect opaque_rect_;
 
   TilePriority priority_[2];
   ManagedTileState managed_state_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILE_H_