Ensure tests have an active task runner

chrome/browser/background/background_contents_service.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_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_
 #define CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 57 matching lines @@
 
   // Get the crash notification's delegate id for the extension.
   static std::string GetNotificationDelegateIdForExtensionForTesting(
       const std::string& extension_id);
 
   // Show a popup notification balloon with a crash message for a given app/
   // extension.
   static void ShowBalloonForTesting(const extensions::Extension* extension,
                                     Profile* profile);
 
+  // Disable closing the crash notification balloon for tests.
+  static void DisableCloseBalloonForTesting(
+      bool disable_close_balloon_for_testing);
+
   // Returns the BackgroundContents associated with the passed application id,
   // or NULL if none.
   BackgroundContents* GetAppBackgroundContents(const base::string16& appid);
 
   // Returns true if there's a registered BackgroundContents for this app. It
   // is possible for this routine to return true when GetAppBackgroundContents()
   // returns false, if the BackgroundContents closed due to the render process
   // crashing.
   bool HasRegisteredBackgroundContents(const base::string16& appid);
 
@@ skipping 148 matching lines @@
   BackgroundContentsMap contents_map_;
 
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundContentsService);
 };
 
 #endif  // CHROME_BROWSER_BACKGROUND_BACKGROUND_CONTENTS_SERVICE_H_