Remove remaining calls to deprecated MessageLoop methods on Mac.

ui/views/widget/native_widget_mac_unittest.mm

Index: ui/views/widget/native_widget_mac_unittest.mm
diff --git a/ui/views/widget/native_widget_mac_unittest.mm b/ui/views/widget/native_widget_mac_unittest.mm
index b5814720f66572dd6c07565e0f2e5da76bebf1d8..37d71bbf8c57132cbcfb991675a785589381c2cb 100644
--- a/ui/views/widget/native_widget_mac_unittest.mm
+++ b/ui/views/widget/native_widget_mac_unittest.mm
@@ -6,14 +6,12 @@
 
 #import <Cocoa/Cocoa.h>
 
-#include "base/location.h"
 #import "base/mac/foundation_util.h"
-#import "base/mac/scoped_nsobject.h"
 #import "base/mac/scoped_nsautorelease_pool.h"
+#import "base/mac/scoped_nsobject.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"
@@ -442,10 +440,10 @@ TEST_F(NativeWidgetMacTest, DISABLED_OrderFrontAfterMiniaturize) {
 
   // 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());