Separate out IPC::Message::Sender and channel::Listener into a separate class.

content/public/browser/render_widget_host.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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #pragma once
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/keyboard_listener.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "ipc/ipc_channel.h"
+#include "ipc/ipc_sender.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextDirection.h"
 #include "ui/gfx/size.h"
 #include "ui/surface/transport_dib.h"
 
 #if defined(TOOLKIT_GTK)
 #include "ui/base/x/x11_util.h"
 #elif defined(OS_MACOSX)
 #include "skia/ext/platform_device.h"
 #endif
@@ skipping 71 matching lines @@
 // deletes itself, which is safe because no one else should have any references
 // to it (the WebContents does not).
 //
 // It should be noted that the RenderViewHost, not the RenderWidgetHost,
 // handles IPC messages relating to the render process going away, since the
 // way a RenderViewHost (WebContents) handles the process dying is different to
 // the way a select popup does. As such the RenderWidgetHostView handles these
 // messages for select popups. This placement is more out of convenience than
 // anything else. When the view is live, these messages are forwarded to it by
 // the RenderWidgetHost's IPC message map.
-class CONTENT_EXPORT RenderWidgetHost : public IPC::Channel::Sender {
+class CONTENT_EXPORT RenderWidgetHost : public IPC::Sender {
  public:
   // Free all backing stores used for rendering to drop memory usage.
   static void RemoveAllBackingStores();
 
   // Returns the size of all the backing stores used for rendering
   static size_t BackingStoreMemorySize();
 
   virtual ~RenderWidgetHost() {}
 
   // Edit operations.
@@ skipping 161 matching lines @@
   // within content/.  This method is necessary because
   // RenderWidgetHost is the root of a diamond inheritance pattern, so
   // subclasses inherit it virtually, which removes our ability to
   // static_cast to the subclass.
   virtual RenderWidgetHostImpl* AsRenderWidgetHostImpl() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_