Remove calls to deprecated MessageLoop methods in ui.

ui/arc/notification/arc_notification_manager_unittest.cc

 // Copyright 2016 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 <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 59 matching lines @@
   bool ready_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationsObserver);
 };
 
 }  // anonymous namespace
 
 class ArcNotificationManagerTest : public testing::Test {
  public:
   ArcNotificationManagerTest() {}
-  ~ArcNotificationManagerTest() override { loop_.RunUntilIdle(); }
+  ~ArcNotificationManagerTest() override { base::RunLoop().RunUntilIdle(); }
 
  protected:
   FakeArcBridgeService* service() { return service_.get(); }
   FakeNotificationsInstance* arc_notifications_instance() {
     return arc_notifications_instance_.get();
   }
   ArcNotificationManager* arc_notification_manager() {
     return arc_notification_manager_.get();
   }
   MockMessageCenter* message_center() { return message_center_.get(); }
@@ skipping 29 matching lines @@
     message_center_.reset(new MockMessageCenter());
 
     arc_notification_manager_.reset(new ArcNotificationManager(
         service(), EmptyAccountId(), message_center_.get()));
 
     NotificationsObserver observer;
     service_->notifications()->AddObserver(&observer);
     service_->notifications()->SetInstance(arc_notifications_instance_.get());
 
     while (!observer.IsReady())
-      loop_.RunUntilIdle();
+      base::RunLoop().RunUntilIdle();
 
     service_->notifications()->RemoveObserver(&observer);
   }
 
   void TearDown() override {
     arc_notification_manager_.reset();
     message_center_.reset();
     service_.reset();
     arc_notifications_instance_.reset();
   }
@@ skipping 37 matching lines @@
   CreateNotificationWithKey("notification2");
   CreateNotificationWithKey("notification3");
   EXPECT_EQ(3u, message_center()->GetVisibleNotifications().size());
 
   arc_notification_manager()->OnInstanceClosed();
 
   EXPECT_EQ(0u, message_center()->GetVisibleNotifications().size());
 }
 
 }  // namespace arc