Introduce ActiveScriptController; track active extension scripts

chrome/browser/extensions/page_action_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_PAGE_ACTION_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_PAGE_ACTION_CONTROLLER_H_
 
 #include <string>
 
-#include "base/observer_list.h"
-#include "chrome/browser/extensions/location_bar_controller.h"
-#include "content/public/browser/web_contents_observer.h"
+#include "chrome/browser/extensions/location_bar_controller_provider.h"
 
 class Profile;
 
 namespace extensions {
 class ExtensionRegistry;
 
 // A LocationBarController which populates the location bar with icons based
 // on the page_action extension API.
-class PageActionController : public LocationBarController,
-                             public content::WebContentsObserver {
+class PageActionController : public LocationBarControllerProvider {
  public:
   explicit PageActionController(content::WebContents* web_contents);
   virtual ~PageActionController();
 
-  // LocationBarController implementation.
-  virtual std::vector<ExtensionAction*> GetCurrentActions() const OVERRIDE;
-  virtual Action OnClicked(const std::string& extension_id,
-                           int mouse_button) OVERRIDE;
-  virtual void NotifyChange() OVERRIDE;
-
-  // content::WebContentsObserver implementation.
-  virtual void DidNavigateMainFrame(
+  // LocationBarController::Provider implementation.
+  virtual std::vector<ExtensionAction*> GetCurrentActions() OVERRIDE;
+  virtual LocationBarController::Action OnClicked(
+      const Extension* extension,
+      LocationBarController::MouseButton button) OVERRIDE;
+  virtual void NavigatedMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
 
  private:
-  // Gets the Profile for the web contents.
-  Profile* GetProfile() const;
-
-  // Gets the ExtensionRegistry for the web contents.
-  ExtensionRegistry* GetExtensionRegistry() const;
+  Profile* GetProfile();
 
   DISALLOW_COPY_AND_ASSIGN(PageActionController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_PAGE_ACTION_CONTROLLER_H_