Cleanup: Remove unneeded forward declarations in chrome/renderer.

chrome/renderer/extensions/extension_dispatcher.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 CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_
 #define CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_
 #pragma once
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/shared_memory.h"
 #include "base/timer.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "chrome/common/extensions/extension_set.h"
 #include "chrome/renderer/extensions/chrome_v8_context_set.h"
 #include "v8/include/v8.h"
 
 class GURL;
 class URLPattern;
 class UserScriptSlave;
 struct ExtensionMsg_Loaded_Params;
-struct ExtensionMsg_UpdatePermissions_Params;
 
 namespace WebKit {
 class WebFrame;
 }
 
 namespace base {
 class ListValue;
 }
 
 namespace content {
@@ skipping 134 matching lines @@
   // Status of webrequest usage for known extensions.
   // TODO(mpcomplete): remove. http://crbug.com/100411
   bool webrequest_adblock_;
   bool webrequest_adblock_plus_;
   bool webrequest_other_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionDispatcher);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_