chrome: Use base::MessageLoop. (Part 2)

chrome/browser/ui/cocoa/tab_contents/render_view_context_menu_mac.mm

 // Copyright (c) 2012 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 "chrome/browser/ui/cocoa/tab_contents/render_view_context_menu_mac.h"
 
 #include "base/compiler_specific.h"
 #import "base/mac/scoped_sending_event.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/message_loop.h"
@@ skipping 70 matching lines @@
                                       modifierFlags:NSRightMouseDownMask
                                           timestamp:eventTime
                                        windowNumber:[window windowNumber]
                                             context:nil
                                         eventNumber:0
                                          clickCount:1
                                            pressure:1.0];
 
   {
     // Make sure events can be pumped while the menu is up.
-    MessageLoop::ScopedNestableTaskAllower allow(MessageLoop::current());
+    base::MessageLoop::ScopedNestableTaskAllower allow(
+        base::MessageLoop::current());
 
     // One of the events that could be pumped is |window.close()|.
     // User-initiated event-tracking loops protect against this by
     // setting flags in -[CrApplication sendEvent:], but since
     // web-content menus are initiated by IPC message the setup has to
     // be done manually.
     base::mac::ScopedSendingEvent sendingEventScoper;
 
     // Show the menu.
     [NSMenu popUpContextMenu:[menu_controller_ menu]
@@ skipping 176 matching lines @@
                                      command_id);
   if (!item)
     return;
 
   // Update the returned NSMenuItem directly so we can update it immediately.
   [item setEnabled:enabled];
   [item setTitle:SysUTF16ToNSString(title)];
   [item setHidden:hidden];
   [[item menu] itemChanged:item];
 }