Remove parts of //cc we aren't using

cc/test/fake_tile_manager.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_H_
-#define  CC_TEST_FAKE_TILE_MANAGER_H_
-
-#include <set>
-#include <vector>
-
-#include "cc/resources/tile_manager.h"
-
-namespace cc {
-
-class FakeTileManager : public TileManager {
- public:
-  explicit FakeTileManager(TileManagerClient* client);
-  FakeTileManager(TileManagerClient* client, ResourcePool* resource_pool);
-  ~FakeTileManager() override;
-
-  bool HasBeenAssignedMemory(Tile* tile);
-  void AssignMemoryToTiles(
-      const GlobalStateThatImpactsTilePriority& state);
-
-  void Release(Tile* tile) override;
-
-  std::vector<Tile*> tiles_for_raster;
-};
-
-}  // namespace cc
-
-#endif  // CC_TEST_FAKE_TILE_MANAGER_H_