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chrome/browser/extensions/script_bubble_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_BUBBLE_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_SCRIPT_BUBBLE_CONTROLLER_H_
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "content/public/browser/web_contents_observer.h"
 
+class ExtensionService;
+
 namespace extensions {
 
 class ExtensionSystem;
 
 // Controls the script bubble in the omnibox, which displays information about
 // extensions which are interacting with the current tab.
 class ScriptBubbleController
     : public TabHelper::ScriptExecutionObserver,
       public content::WebContentsObserver {
  public:
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   // The accumulated set of extension IDs that are operating on this tab.
   std::set<std::string> extensions_running_scripts_;
 
   DISALLOW_COPY_AND_ASSIGN(ScriptBubbleController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SCRIPT_BUBBLE_CONTROLLER_H_