Enable script bubble by default on all but mac.

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>
 
@@ skipping 25 matching lines @@
       const content::WebContents* web_contents,
       const ExecutingScriptsMap& extension_ids,
       int32 page_id,
       const GURL& on_url) OVERRIDE;
 
   // content::WebContentsObserver implementation.
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
 
+  void OnExtensionUnloaded(const std::string& extension_id);
+
  private:
   // Helper to get the profile of the web contents we're associated with.
   Profile* profile() const;
 
   // Helper to get the extension service for the profile of the web contents
   // we're associated with.
   ExtensionService* GetExtensionService() const;
 
   // Helper to update the properties of the script bubble to reflect current
   // internal state.
   void UpdateScriptBubble();
 
   // 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_