Replace "nested message loop" with "nested run loop" in comments.

ui/views/controls/menu/menu_runner_cocoa_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/controls/menu/menu_runner_impl_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 191 matching lines @@
     // An anchor view should only be added for Native menus.
     if (GetParam() == MenuType::NATIVE) {
       ASSERT_EQ(2u, [subviews count]);
       last_anchor_frame_ = [[subviews objectAtIndex:1] frame];
     } else {
       EXPECT_EQ(1u, [subviews count]);
     }
     runner_->Cancel();
   }
 
-  // Run a nested message loop so that async and sync menus can be tested the
+  // Run a nested run loop so that async and sync menus can be tested the
   // same way.
   void MaybeRunAsync() {
     if (!IsAsync())
       return;
 
     base::RunLoop run_loop;
     quit_closure_ = run_loop.QuitClosure();
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
         FROM_HERE, quit_closure_, TestTimeouts::action_timeout());
     run_loop.Run();
@@ skipping 139 matching lines @@
   EXPECT_EQ(combobox_rect.right(), last_anchor_frame_.origin.x);
 }
 
 INSTANTIATE_TEST_CASE_P(,
                         MenuRunnerCocoaTest,
                         ::testing::Values(MenuType::NATIVE, MenuType::VIEWS),
                         &MenuTypeToString);
 
 }  // namespace test
 }  // namespace views