Remove obviously unneeded forward declarations in chrome/browser/[abef]*/*.h.

chrome/browser/extensions/extension_function_dispatcher.h

-// Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_DISPATCHER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_DISPATCHER_H_
 #pragma once
 
 #include <string>
-#include <set>
 #include <vector>
 
 #include "base/ref_counted.h"
 #include "gfx/native_widget_types.h"
 #include "googleurl/src/gurl.h"
 
 class Browser;
 class Extension;
-class ExtensionDOMUI;
 class ExtensionFunction;
-class ExtensionHost;
 class ListValue;
 class Profile;
 class RenderViewHost;
-class RenderViewHostDelegate;
 class TabContents;
 
 // A factory function for creating new ExtensionFunction instances.
 typedef ExtensionFunction* (*ExtensionFunctionFactory)();
 
 // ExtensionFunctionDispatcher receives requests to execute functions from
 // Chromium extensions running in a RenderViewHost and dispatches them to the
 // appropriate handler. It lives entirely on the UI thread.
 class ExtensionFunctionDispatcher {
  public:
@@ skipping 111 matching lines @@
 
   // AutomationExtensionFunction requires access to the RenderViewHost
   // associated with us.  We make it a friend rather than exposing the
   // RenderViewHost as a public method as we wouldn't want everyone to
   // start assuming a 1:1 relationship between us and RenderViewHost,
   // whereas AutomationExtensionFunction is by necessity "tight" with us.
   friend class AutomationExtensionFunction;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_DISPATCHER_H_