Use a direct include of the message_loop header in content/, part 2.

content/browser/renderer_host/popup_menu_helper_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.
 
 #import <Carbon/Carbon.h>
 
 #include "content/browser/renderer_host/popup_menu_helper_mac.h"
 
 #include "base/mac/scoped_nsobject.h"
 #import "base/mac/scoped_sending_event.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 #include "content/browser/renderer_host/webmenurunner_mac.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #import "ui/base/cocoa/base_view.h"
 
 namespace content {
 
 namespace {
@@ skipping 81 matching lines @@
 
 void PopupMenuHelper::Observe(int type,
                               const NotificationSource& source,
                               const NotificationDetails& details) {
   DCHECK(type == NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED);
   DCHECK(Source<RenderWidgetHost>(source).ptr() == render_view_host_);
   render_view_host_ = NULL;
 }
 
 }  // namespace content