Revert 96089 - Remove video_channel() from Session interface

remoting/protocol/video_writer.h

Index: remoting/protocol/video_writer.h
===================================================================
--- remoting/protocol/video_writer.h	(revision 96105)
+++ remoting/protocol/video_writer.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -11,7 +11,6 @@
 #define REMOTING_PROTOCOL_VIDEO_WRITER_H_
 
 #include "base/basictypes.h"
-#include "base/callback.h"
 #include "remoting/protocol/video_stub.h"
 
 namespace remoting {
@@ -24,14 +23,10 @@
  public:
   virtual ~VideoWriter();
 
-  // The callback is called when initialization is finished. The
-  // parameter is set to true on success.
-  typedef base::Callback<void(bool)> InitializedCallback;
-
   static VideoWriter* Create(const SessionConfig* config);
 
   // Initializes the writer.
-  virtual void Init(Session* session, const InitializedCallback& callback) = 0;
+  virtual void Init(Session* session) = 0;
 
   // Stops writing. Must be called on the network thread before this
   // object is destroyed.