Remove calls to deprecated MessageLoop methods in ui.

ui/base/cocoa/menu_controller_unittest.mm

Index: ui/base/cocoa/menu_controller_unittest.mm
diff --git a/ui/base/cocoa/menu_controller_unittest.mm b/ui/base/cocoa/menu_controller_unittest.mm
index e49904ab02dc3a76b63752256af1575d3b466066..24a86f021b341f6816283678508297e890195687 100644
--- a/ui/base/cocoa/menu_controller_unittest.mm
+++ b/ui/base/cocoa/menu_controller_unittest.mm
@@ -5,6 +5,7 @@
 #import <Cocoa/Cocoa.h>
 
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -386,7 +387,7 @@ TEST_F(MenuControllerTest, OpenClose) {
   EXPECT_FALSE(delegate.did_close_);
 
   // Pump the task that notifies the delegate.
-  message_loop.RunUntilIdle();
+  base::RunLoop().RunUntilIdle();
 
   // Expect that the delegate got notified properly.
   EXPECT_TRUE(delegate.did_close_);