Decouple IPC::MessageFilter from IPC::Channel

content/renderer/input/input_event_filter.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 CONTENT_RENDERER_INPUT_INPUT_EVENT_FILTER_H_
 #define CONTENT_RENDERER_INPUT_INPUT_EVENT_FILTER_H_
 
 #include <queue>
 #include <set>
 
@@ skipping 42 matching lines @@
   //
   virtual void SetBoundHandler(const Handler& handler) OVERRIDE;
   virtual void DidAddInputHandler(int routing_id,
                                   cc::InputHandler* input_handler) OVERRIDE;
   virtual void DidRemoveInputHandler(int routing_id) OVERRIDE;
   virtual void DidOverscroll(int routing_id,
                              const DidOverscrollParams& params) OVERRIDE;
   virtual void DidStopFlinging(int routing_id) OVERRIDE;
 
   // IPC::MessageFilter methods:
-  virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
+  virtual void OnFilterAdded(IPC::Sender* sender) OVERRIDE;
   virtual void OnFilterRemoved() OVERRIDE;
   virtual void OnChannelClosing() OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
   virtual ~InputEventFilter();
 
   void ForwardToMainListener(const IPC::Message& message);
   void ForwardToHandler(const IPC::Message& message);
   void SendMessage(scoped_ptr<IPC::Message> message);
@@ skipping 22 matching lines @@
   // Used to intercept overscroll notifications while an event is being
   // dispatched.  If the event causes overscroll, the overscroll metadata can be
   // bundled in the event ack, saving an IPC.  Note that we must continue
   // supporting overscroll IPC notifications due to fling animation updates.
   scoped_ptr<DidOverscrollParams>* current_overscroll_params_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_EVENT_FILTER_H_