Re-land: cc: Examine layers to determine if we're ready to activate.

cc/test/fake_tile_manager_client.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_TEST_FAKE_TILE_MANAGER_CLIENT_H_
 #define CC_TEST_FAKE_TILE_MANAGER_CLIENT_H_
 
 #include "cc/resources/tile_manager.h"
 
 namespace cc {
 
 class FakeTileManagerClient : public TileManagerClient {
  public:
   virtual ~FakeTileManagerClient() {}
 
   // TileManagerClient implementation.
   virtual void NotifyReadyToActivate() OVERRIDE {}
-  virtual void NotifyTileInitialized(const Tile* tile) OVERRIDE {}
+  virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE {}
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_TILE_MANAGER_CLIENT_H_