Move Extension into extensions namespace

chrome/browser/extensions/script_badge_controller.h

 // Copyright (c) 2012 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_SCRIPT_BADGE_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_SCRIPT_BADGE_CONTROLLER_H_
 #pragma once
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/memory/linked_ptr.h"
 #include "chrome/browser/extensions/action_box_controller.h"
 #include "chrome/browser/extensions/script_executor.h"
 #include "chrome/browser/extensions/script_executor_impl.h"
 #include "content/public/browser/web_contents_observer.h"
 
-class Extension;
 class ExtensionAction;
 class ExtensionService;
 class TabContentsWrapper;
 
 namespace extensions {
 
+class Extension;
+
 // An ActionBoxController which corresponds to script badges, and implements
 // ScriptExecutor in order to show those scripts in the action box too.
 class ScriptBadgeController : public ActionBoxController,
                               public ScriptExecutor,
                               public content::WebContentsObserver {
  public:
   explicit ScriptBadgeController(TabContentsWrapper* tab_contents);
   virtual ~ScriptBadgeController();
 
   // ActionBoxController implementation.
@@ skipping 37 matching lines @@
   // that get generated for extensions that haven't declared anything.
   typedef std::map<std::string, linked_ptr<ExtensionAction> > ScriptBadgeMap;
   ScriptBadgeMap script_badges_;
 
   DISALLOW_COPY_AND_ASSIGN(ScriptBadgeController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SCRIPT_BADGE_CONTROLLER_H_