Update a bunch of files to the new location of browser_thread.h

chrome/browser/chromeos/audio_handler.cc

 // Copyright (c) 2010 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/chromeos/audio_handler.h"
 
 #include <math.h>
 
 #include "base/logging.h"
 #include "base/singleton.h"
-#include "chrome/browser/browser_thread.h"
 #include "chrome/browser/chromeos/audio_mixer_alsa.h"
 #include "chrome/browser/chromeos/audio_mixer_pulse.h"
+#include "content/browser/browser_thread.h"
 
 namespace chromeos {
 
 namespace {
 
 const double kMinVolumeDb = -90.0;
 // Choosing 6.0dB here instead of 0dB to give user chance to amplify audio some
 // in case sounds or their setup is too quiet for them.
 const double kMaxVolumeDb = 6.0;
 // A value of less than one adjusts quieter volumes in larger steps (giving
@@ skipping 209 matching lines @@
   return pow(volume_percent / 100.0, kVolumeBias) *
       (max_volume_db_ - min_volume_db_) + min_volume_db_;
 }
 
 // static
 AudioHandler* AudioHandler::GetInstance() {
   return Singleton<AudioHandler>::get();
 }
 
 }  // namespace chromeos