content: Cleanup class/struct forward declarations

content/renderer/p2p/socket_dispatcher.h

 // Copyright (c) 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.
 
 // P2PSocketDispatcher is a per-renderer object that dispatchers all
 // P2P messages received from the browser and relays all P2P messages
 // sent to the browser. P2PSocketClient instances register themselves
 // with the dispatcher using RegisterClient() and UnregisterClient().
 //
 // Relationship of classes.
@@ skipping 33 matching lines @@
 
 namespace net {
 class IPEndPoint;
 }  // namespace net
 
 namespace content {
 
 class NetworkListObserver;
 class P2PAsyncAddressResolver;
 class P2PSocketClientImpl;
-class RenderViewImpl;
 
 class CONTENT_EXPORT P2PSocketDispatcher : public IPC::MessageFilter,
                                            public NetworkListManager {
  public:
   explicit P2PSocketDispatcher(base::SingleThreadTaskRunner* ipc_task_runner);
 
   // NetworkListManager interface:
   void AddNetworkListObserver(
       NetworkListObserver* network_list_observer) override;
   void RemoveNetworkListObserver(
@@ skipping 60 matching lines @@
 
   // To indicate whether IPC could be invoked on this dispatcher.
   bool connected_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(P2PSocketDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_P2P_SOCKET_DISPATCHER_H_