Move ui_test_utils::RunMessageLoop to test_utils so that it can be reused by content_browsertests.

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 "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_source.h"
 #include "googleurl/src/gurl.h"
 
 // A collections of functions designed for use with unit and browser tests.
 
 namespace content {
 
+// Turns on nestable tasks, runs the message loop, then resets nestable tasks
+// to what they were originally. Prefer this over MessageLoop::Run for in
+// process browser tests that need to block until a condition is met.
+void RunMessageLoop();
+
 // Variant of RunMessageLoop that takes RunLoop.
 void RunThisRunLoop(base::RunLoop* run_loop);
 
 // Get task to quit the given RunLoop. It allows a few generations of pending
 // tasks to run as opposed to run_loop->QuitClosure().
 base::Closure GetQuitTaskForRunLoop(base::RunLoop* run_loop);
 
 // Helper class to Run and Quit the message loop. Run and Quit can only happen
 // once per instance. Make a new instance for each use. Calling Quit after Run
 // has returned is safe and has no effect.
@@ skipping 72 matching lines @@
   NotificationSource source_;
   NotificationDetails details_;
   scoped_refptr<MessageLoopRunner> message_loop_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowedNotificationObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_UTILS_H_