Move BrowserThread to content namespace.

content/browser/power_save_blocker_win.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/power_save_blocker.h"
 
 #include <windows.h>
 
 #include "content/public/browser/browser_thread.h"
 
+using content::BrowserThread;
+
 // Called only from UI thread.
 // static
 void PowerSaveBlocker::ApplyBlock(PowerSaveBlockerType type) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   DWORD flags = ES_CONTINUOUS;
 
   switch (type) {
     case kPowerSaveBlockPreventSystemSleep:
       flags |= ES_SYSTEM_REQUIRED;
       break;
     case kPowerSaveBlockPreventDisplaySleep:
       flags |= ES_DISPLAY_REQUIRED;
       break;
     default:
       break;
   }
 
   SetThreadExecutionState(flags);
 }