Remove parts of //cc we aren't using

cc/layers/delegated_frame_resource_collection.h

-// Copyright 2013 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_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_
-#define CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_
-
-#include "base/containers/hash_tables.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "cc/base/cc_export.h"
-#include "cc/resources/return_callback.h"
-#include "cc/resources/returned_resource.h"
-#include "cc/resources/transferable_resource.h"
-
-namespace cc {
-
-class CC_EXPORT DelegatedFrameResourceCollectionClient {
- public:
-  // Called to inform the client that returned resources can be
-  // grabbed off the DelegatedFrameResourceCollection.
-  virtual void UnusedResourcesAreAvailable() = 0;
-};
-
-class CC_EXPORT DelegatedFrameResourceCollection
-    : public base::RefCounted<DelegatedFrameResourceCollection> {
- public:
-  DelegatedFrameResourceCollection();
-
-  void SetClient(DelegatedFrameResourceCollectionClient* client);
-
-  void TakeUnusedResourcesForChildCompositor(ReturnedResourceArray* array);
-
-  // Considers all resources as lost, and returns true if it held any resource
-  // to lose.
-  bool LoseAllResources();
-
-  // Methods for DelegatedFrameProvider.
-  void RefResources(const TransferableResourceArray& resources);
-  void UnrefResources(const ReturnedResourceArray& returned);
-  void ReceivedResources(const TransferableResourceArray& resources);
-  ReturnCallback GetReturnResourcesCallbackForImplThread();
-
- private:
-  friend class base::RefCounted<DelegatedFrameResourceCollection>;
-  ~DelegatedFrameResourceCollection();
-
-  DelegatedFrameResourceCollectionClient* client_;
-
-  ReturnedResourceArray returned_resources_for_child_compositor_;
-  bool lost_all_resources_;
-
-  struct RefCount {
-    int refs_to_return;
-    int refs_to_wait_for;
-  };
-  typedef base::hash_map<unsigned, RefCount> ResourceIdRefCountMap;
-  ResourceIdRefCountMap resource_id_ref_count_map_;
-
-  base::ThreadChecker main_thread_checker_;
-  base::WeakPtrFactory<DelegatedFrameResourceCollection> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(DelegatedFrameResourceCollection);
-};
-
-}  // namespace cc
-
-#endif  // CC_LAYERS_DELEGATED_FRAME_RESOURCE_COLLECTION_H_