Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/content_settings/content_setting_media_menu_model.cc

 // Copyright 2013 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/content_settings/content_setting_media_menu_model.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #include "chrome/browser/ui/content_settings/content_setting_bubble_model.h"
 
@@ skipping 11 matching lines @@
             media_bubble_model_->content_type());
   MediaCaptureDevicesDispatcher* dispatcher =
       MediaCaptureDevicesDispatcher::GetInstance();
   const content::MediaStreamDevices& devices =
       (type_ == content::MEDIA_DEVICE_AUDIO_CAPTURE) ?
           dispatcher->GetAudioCaptureDevices() :
           dispatcher->GetVideoCaptureDevices();
 
   for (size_t i = 0; i < devices.size(); ++i) {
     commands_.insert(std::make_pair(commands_.size(), devices[i]));
-    AddItem(i, UTF8ToUTF16(devices[i].name));
+    AddItem(i, base::UTF8ToUTF16(devices[i].name));
   }
 }
 
 ContentSettingMediaMenuModel::~ContentSettingMediaMenuModel() {
 }
 
 bool ContentSettingMediaMenuModel::IsCommandIdChecked(int command_id) const {
   return false;
 }
 
 bool ContentSettingMediaMenuModel::IsCommandIdEnabled(int command_id) const {
   return true;
 }
 
 bool ContentSettingMediaMenuModel::GetAcceleratorForCommandId(
     int command_id,
     ui::Accelerator* accelerator) {
   return false;
 }
 
 void ContentSettingMediaMenuModel::ExecuteCommand(int command_id,
                                                   int event_flags) {
   CommandMap::const_iterator it = commands_.find(command_id);
   DCHECK(it != commands_.end());
   media_bubble_model_->OnMediaMenuClicked(type_, it->second.id);
 
   if (!callback_.is_null())
     callback_.Run(type_, it->second.name);
 }