Move Render(View|Widget)Host and associated classes to content namespace.

content/browser/tab_contents/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/tab_contents/popup_menu_helper_mac.h"
 
 #import "base/mac/scoped_sending_event.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/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/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #import "ui/base/cocoa/base_view.h"
 #include "webkit/glue/webmenurunner_mac.h"
 
+using content::RenderViewHost;
+using content::RenderViewHostImpl;
+using content::RenderWidgetHost;
+
 PopupMenuHelper::PopupMenuHelper(RenderViewHost* render_view_host)
     : render_view_host_(static_cast<RenderViewHostImpl*>(render_view_host)) {
   notification_registrar_.Add(
       this, content::NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
       content::Source<RenderWidgetHost>(render_view_host));
 }
 
 void PopupMenuHelper::ShowPopupMenu(
     const gfx::Rect& bounds,
     int item_height,
@@ skipping 49 matching lines @@
 
 void PopupMenuHelper::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK(type == content::NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED);
   DCHECK(content::Source<RenderWidgetHost>(source).ptr() == render_view_host_);
   render_view_host_ = NULL;
 }