cc: Remove tile ref counting in tile manager.

cc/test/fake_tile_manager.h

Index: cc/test/fake_tile_manager.h
diff --git a/cc/test/fake_tile_manager.h b/cc/test/fake_tile_manager.h
index f79ea54cda88d9839503416f7e0aec44ce179350..456deb2dda24b6d520300662fb836668efd7d1ee 100644
--- a/cc/test/fake_tile_manager.h
+++ b/cc/test/fake_tile_manager.h
@@ -5,6 +5,8 @@
 #ifndef  CC_TEST_FAKE_TILE_MANAGER_H_
 #define  CC_TEST_FAKE_TILE_MANAGER_H_
 
+#include <vector>
+
 #include "cc/resources/tile_manager.h"
 
 namespace cc {
@@ -19,8 +21,11 @@ class FakeTileManager : public TileManager {
 
   void ReassignMemoryToOOMTilesRequiredForActivation();
   bool HasBeenAssignedMemory(Tile* tile);
+  void AssignMemoryToTiles();
 
   virtual ~FakeTileManager() { }
+
+  std::vector<Tile*> tiles_for_raster;
 };
 
 }  // namespace cc