Get rid of extensions dependency from content\browser.

content/browser/renderer_host/render_view_host.h

 // Copyright (c) 2011 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_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 576 matching lines @@
   void OnUpdateDragCursor(WebKit::WebDragOperation drag_operation);
   void OnTakeFocus(bool reverse);
   void OnAddMessageToConsole(const std::wstring& message,
                              int32 line_no,
                              const std::wstring& source_id);
   void OnUpdateInspectorSetting(const std::string& key,
                                 const std::string& value);
   void OnMsgShouldCloseACK(bool proceed);
 
   void OnExtensionRequest(const ExtensionHostMsg_DomMessage_Params& params);
-  void OnExtensionPostMessage(int port_id, const std::string& message);
   void OnAccessibilityNotifications(
       const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params);
   void OnCSSInserted();
   void OnContentBlocked(ContentSettingsType type,
                         const std::string& resource_identifier);
   void OnAppCacheAccessed(const GURL& manifest_url, bool blocked_by_policy);
   void OnWebDatabaseAccessed(const GURL& url,
                              const string16& name,
                              const string16& display_name,
                              unsigned long estimated_size,
@@ skipping 90 matching lines @@
   // The termination status of the last render view that terminated.
   base::TerminationStatus render_view_termination_status_;
 
   // The enabled/disabled states of various commands.
   std::map<RenderViewCommand, CommandState> command_states_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_