Switch WindowedNotificationObserver to use base::RunLoop.

content/public/test/test_utils.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 CONTENT_PUBLIC_TEST_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_TEST_UTILS_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 217 matching lines @@
 
  private:
   bool seen_;
   bool running_;
   NotificationRegistrar registrar_;
 
   ConditionTestCallback callback_;
 
   NotificationSource source_;
   NotificationDetails details_;
-  scoped_refptr<MessageLoopRunner> message_loop_runner_;
+  std::unique_ptr<base::RunLoop> run_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowedNotificationObserver);
 };
 
 // Unit tests can use code which runs in the utility process by having it run on
 // an in-process utility thread. This eliminates having two code paths in
 // production code to deal with unit tests, and also helps with the binary
 // separation on Windows since chrome.dll doesn't need to call into Blink code
 // for some utility code to handle the single process case.
 // Include this class as a member variable in your test harness if you take
@@ skipping 55 matching lines @@
   void WebContentsDestroyed() override;
 
   base::RunLoop run_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsDestroyedWatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_UTILS_H_