Move BrowserThread to content namespace.

content/browser/renderer_host/media/media_stream_device_settings.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/renderer_host/media/media_stream_device_settings.h"
 
 #include "base/stl_util.h"
 #include "base/task.h"
 #include "content/browser/renderer_host/media/media_stream_settings_requester.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/public/browser/browser_thread.h"
 
+using content::BrowserThread;
+
 namespace media_stream {
 
 typedef std::map<MediaStreamType, StreamDeviceInfoArray> DeviceMap;
 
 // Device request contains all data needed to keep track of requests between the
 // different calls.
 struct MediaStreamDeviceSettings::SettingsRequest {
   SettingsRequest(int render_pid, int render_vid, const std::string& origin,
                   StreamOptions request_options)
     : render_process_id(render_pid),
@@ skipping 106 matching lines @@
     }
   }
 }
 
 void MediaStreamDeviceSettings::UseFakeUI() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   use_fake_ui_ = true;
 }
 
 }  // namespace media_stream