Cleanup: Remove unneeded forward declarations from various chrome/browser subdirectories.

chrome/browser/intents/register_intent_handler_infobar_delegate.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_BROWSER_INTENTS_REGISTER_INTENT_HANDLER_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_INTENTS_REGISTER_INTENT_HANDLER_INFOBAR_DELEGATE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "chrome/browser/tab_contents/confirm_infobar_delegate.h"
 #include "webkit/glue/web_intent_service_data.h"
 
 class InfoBarTabHelper;
-class TabContents;
 class WebIntentsRegistry;
 
 // The InfoBar used to request permission for a site to be registered as an
 // Intent handler.
 class RegisterIntentHandlerInfoBarDelegate : public ConfirmInfoBarDelegate {
  public:
   RegisterIntentHandlerInfoBarDelegate(
       InfoBarTabHelper* infobar_helper,
       WebIntentsRegistry* registry,
       const webkit_glue::WebIntentServiceData& service);
@@ skipping 21 matching lines @@
   // The web intents registry to use. Weak pointer.
   WebIntentsRegistry* registry_;
 
   // The cached intent service data bundle passed up from the renderer.
   webkit_glue::WebIntentServiceData service_;
 
   DISALLOW_COPY_AND_ASSIGN(RegisterIntentHandlerInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_INTENTS_REGISTER_INTENT_HANDLER_INFOBAR_DELEGATE_H_