Move logic to clear ExtensionAction values to ExtensionActionAPI

chrome/browser/extensions/api/extension_action/extension_action_api.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_API_EXTENSION_ACTION_EXTENSION_ACTION_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_EXTENSION_ACTION_EXTENSION_ACTION_API_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 72 matching lines @@
       GetFactoryInstance();
 
   // Add or remove observers.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   void NotifyChange(ExtensionAction* extension_action,
                     content::WebContents* web_contents,
                     content::BrowserContext* browser_context);
 
+  // Clears the values for all ExtensionActions for the tab associated with the
+  // given |web_contents|.
+  void ClearAllValuesForTab(content::WebContents* web_contents);
+
  private:
   friend class BrowserContextKeyedAPIFactory<ExtensionActionAPI>;
 
   // The DispatchEvent methods forward events to the |profile|'s event router.
   static void DispatchEventToExtension(content::BrowserContext* context,
                                        const std::string& extension_id,
                                        const std::string& event_name,
                                        scoped_ptr<base::ListValue> event_args);
 
   // Called when either a browser or page action is executed. Figures out which
@@ skipping 361 matching lines @@
 class PageActionGetPopupFunction
     : public extensions::ExtensionActionGetPopupFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("pageAction.getPopup", PAGEACTION_GETPOPUP)
 
  protected:
   virtual ~PageActionGetPopupFunction() {}
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_EXTENSION_ACTION_EXTENSION_ACTION_API_H_