Move BrowserThread to content namespace.

content/browser/device_orientation/message_filter.cc

 // Copyright (c) 2011 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 "content/browser/device_orientation/message_filter.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/device_orientation/orientation.h"
 #include "content/browser/device_orientation/provider.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_view_host_notification_task.h"
 #include "content/common/device_orientation_messages.h"
 #include "content/public/browser/browser_thread.h"
 
+using content::BrowserThread;
+
 namespace device_orientation {
 
 MessageFilter::MessageFilter() : provider_(NULL) {
 }
 
 MessageFilter::~MessageFilter() {
 }
 
 class MessageFilter::ObserverDelegate
     : public base::RefCounted<ObserverDelegate>, public Provider::Observer {
@@ skipping 68 matching lines @@
                                                         this);
 }
 
 void MessageFilter::OnStopUpdating(int render_view_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   observers_map_.erase(render_view_id);
 }
 
 }  // namespace device_orientation