Get rid of extensions dependency from content\browser.

chrome/browser/extensions/extension_page_actions_module.h

 // Copyright (c) 2009 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_PAGE_ACTIONS_MODULE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PAGE_ACTIONS_MODULE_H_
 #pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 
-class TabContents;
+class TabContentsWrapper;
 class ExtensionAction;
 
 // Base class for page action APIs.
 class PageActionFunction : public SyncExtensionFunction {
  protected:
   virtual ~PageActionFunction() {}
   bool SetPageActionEnabled(bool enable);
 
   bool InitCommon(int tab_id);
   bool SetVisible(bool visible);
 
   ExtensionAction* page_action_;
-  TabContents* contents_;
+  TabContentsWrapper* contents_;
 };
 
 // Implement chrome.pageActions.enableForTab().
 class EnablePageActionFunction : public PageActionFunction {
   ~EnablePageActionFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageActions.enableForTab")
 };
 
 // Implement chrome.pageActions.disableForTab().
@@ skipping 53 matching lines @@
 };
 
 // Implement chrome.pageActions.setBadgeText().
 class PageActionSetBadgeTextFunction : public PageActionFunction {
   ~PageActionSetBadgeTextFunction() {}
   virtual bool RunImpl();
   DECLARE_EXTENSION_FUNCTION_NAME("pageAction.setBadgeText")
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PAGE_ACTIONS_MODULE_H_