Remove remaining calls to deprecated MessageLoop methods on Mac.

ui/views/widget/native_widget_mac_unittest.mm

 // Copyright 2014 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.
 
 #import "ui/views/widget/native_widget_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
-#include "base/location.h"
 #import "base/mac/foundation_util.h"
+#import "base/mac/scoped_nsautorelease_pool.h"
 #import "base/mac/scoped_nsobject.h"
-#import "base/mac/scoped_nsautorelease_pool.h"
 #import "base/mac/scoped_objc_class_swizzler.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
-#include "base/single_thread_task_runner.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/thread_task_runner_handle.h"
 #import "testing/gtest_mac.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #import "ui/base/cocoa/constrained_window/constrained_window_animation.h"
 #import "ui/base/cocoa/window_size_constants.h"
 #import "ui/base/test/scoped_fake_full_keyboard_access.h"
@@ skipping 408 matching lines @@
 
   EXPECT_TRUE(widget->IsMinimized());
   EXPECT_FALSE(widget->IsVisible());
   EXPECT_FALSE(child_widget->IsVisible());
 
   // Restore parent window as AppController does.
   [ns_window makeKeyAndOrderFront:nil];
 
   // Wait and check that child is really visible.
   // TODO(kirr): remove the fixed delay.
-  base::MessageLoop::current()->PostDelayedTask(
+  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure(),
       base::TimeDelta::FromSeconds(2));
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 
   EXPECT_FALSE(widget->IsMinimized());
   EXPECT_TRUE(widget->IsVisible());
   EXPECT_TRUE(child_widget->IsVisible());
   // Check that child window is visible.
   EXPECT_TRUE([child_ns_window occlusionState] & NSWindowOcclusionStateVisible);
   EXPECT_TRUE(IsWindowStackedAbove(child_widget, widget));
   widget->Close();
 }
 
@@ skipping 1300 matching lines @@
 
 - (void)dealloc {
   if (deallocFlag_) {
     DCHECK(!*deallocFlag_);
     *deallocFlag_ = true;
   }
   [super dealloc];
 }
 
 @end