content: Cleanup class/struct forward declarations

content/child/blob_storage/blob_transport_controller.h

 // Copyright 2015 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 CONTENT_CHILD_BLOB_STORAGE_BLOB_TRANSPORT_CONTROLLER_H_
 #define CONTENT_CHILD_BLOB_STORAGE_BLOB_TRANSPORT_CONTROLLER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 19 matching lines @@
 class TaskRunner;
 }
 
 namespace storage {
 class DataElement;
 struct BlobItemBytesRequest;
 struct BlobItemBytesResponse;
 }
 
 namespace IPC {
-class Message;
 class Sender;
 }
 
 namespace content {
 
 class BlobConsolidation;
 class ThreadSafeSender;
 
 // This class is used to manage all the asynchronous transporation of blobs from
 // the Renderer to the Browser process, where it's handling the Renderer side.
@@ skipping 90 matching lines @@
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner_;
   std::map<std::string, scoped_refptr<BlobConsolidation>> blob_storage_;
   base::WeakPtrFactory<BlobTransportController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobTransportController);
 };
 
 }  // namespace content
 #endif  // CONTENT_CHILD_BLOB_STORAGE_BLOB_TRANSPORT_CONTROLLER_H_