cc: Refactor how picture layers are exposed to the tile manager.

cc/test/fake_tile_manager_client.h

Index: cc/test/fake_tile_manager_client.h
diff --git a/cc/test/fake_tile_manager_client.h b/cc/test/fake_tile_manager_client.h
index 7faa30ed382f28791dbcc7ad39852a0ff567280e..5c3812876d69c5922ce7fad3f5fb55edd92623d4 100644
--- a/cc/test/fake_tile_manager_client.h
+++ b/cc/test/fake_tile_manager_client.h
@@ -5,17 +5,24 @@
 #ifndef CC_TEST_FAKE_TILE_MANAGER_CLIENT_H_
 #define CC_TEST_FAKE_TILE_MANAGER_CLIENT_H_
 
+#include <vector>
+
 #include "cc/resources/tile_manager.h"
 
 namespace cc {
 
 class FakeTileManagerClient : public TileManagerClient {
  public:
-  virtual ~FakeTileManagerClient() {}
+  FakeTileManagerClient();
+  virtual ~FakeTileManagerClient();
 
   // TileManagerClient implementation.
+  virtual const std::vector<PictureLayerImpl*>& GetPictureLayers() OVERRIDE;
   virtual void NotifyReadyToActivate() OVERRIDE {}
   virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE {}
+
+ private:
+  std::vector<PictureLayerImpl*> picture_layers_;
 };
 
 }  // namespace cc