Removes unnecessary namespace qualifier in device_orientation

content/browser/device_orientation/provider.cc

 // 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.
 
 #include "content/browser/device_orientation/provider.h"
 
 #include "base/logging.h"
 #include "content/browser/device_orientation/data_fetcher.h"
 #include "content/browser/device_orientation/provider_impl.h"
 #include "content/public/browser/browser_thread.h"
 
 #if defined(OS_MACOSX)
 #include "content/browser/device_orientation/accelerometer_mac.h"
 #elif defined(OS_ANDROID)
 #include "content/browser/device_orientation/data_fetcher_impl_android.h"
 #endif
 
-using content::BrowserThread;
-
 namespace content {
 
 Provider* Provider::GetInstance() {
   if (!instance_) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
     ProviderImpl::DataFetcherFactory default_factory = NULL;
 
 #if defined(OS_MACOSX)
     default_factory = AccelerometerMac::Create;
 #elif defined(OS_ANDROID)
@@ skipping 18 matching lines @@
 }
 
 Provider::~Provider() {
   DCHECK(instance_ == this);
   instance_ = NULL;
 }
 
 Provider* Provider::instance_ = NULL;
 
 } //  namespace content