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

services/ui/ws/window_manager_client_unittest.cc

 // 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.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 286 matching lines @@
   // Establishes a connection to this application and asks for a
   // WindowTreeClient.
   ui::mojom::WindowTreeClientPtr ConnectAndGetWindowServerClient() {
     ui::mojom::WindowTreeClientPtr client;
     connector()->BindInterface(test_name(), &client);
     return client;
   }
 
   std::unique_ptr<ClientAreaChange> WaitForClientAreaToChange() {
     client_area_change_ = base::MakeUnique<ClientAreaChange>();
-    // The nested message loop is quit in OnWmSetClientArea(). Client area
+    // The nested run loop is quit in OnWmSetClientArea(). Client area
     // changes don't route through the window, only the WindowManagerDelegate.
     if (!WindowServerTestBase::DoRunLoopWithTimeout()) {
       client_area_change_.reset();
       return nullptr;
     }
     return std::move(client_area_change_);
   }
 
   // WindowServerTestBase:
   void OnEmbed(
@@ skipping 462 matching lines @@
   ASSERT_EQ(1u, top_level_in_wm->children().size());
   aura::Window* second_client_child_in_wm = top_level_in_wm->children()[0];
   ASSERT_EQ(1u, second_client_child_in_wm->children().size());
   aura::Window* transient_in_wm = second_client_child_in_wm->children()[0];
   ASSERT_EQ(second_client_child_in_wm,
             transient_window_client->GetTransientParent(transient_in_wm));
 }
 
 }  // namespace ws
 }  // namespace ui