Show an extension info bubble when a script badge is clicked.

chrome/browser/extensions/script_badge_controller.cc

 // 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.
 
 #include "chrome/browser/extensions/script_badge_controller.h"
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 29 matching lines @@
     const std::string& extension_id, int mouse_button) {
   ExtensionService* service = GetExtensionService();
   if (!service)
     return ACTION_NONE;
 
   const Extension* extension = service->extensions()->GetByID(extension_id);
   CHECK(extension);
 
   switch (mouse_button) {
     case 1:  // left
+      return ACTION_SHOW_SCRIPT_POPUP;
     case 2:  // middle
       // TODO(kalman): decide what to do here.
       return ACTION_NONE;
     case 3:  // right
       return extension->ShowConfigureContextMenus() ?
           ACTION_SHOW_CONTEXT_MENU : ACTION_NONE;
   }
 
   return ACTION_NONE;
 }
@@ skipping 128 matching lines @@
       current_actions_.erase(it);
       break;
     }
   }
 
   CHECK_EQ(size_before, current_actions_.size() + 1);
   return true;
 }
 
 }  // namespace extensions