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

chrome/browser/chromeos/cros/brightness_library.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/cros/brightness_library.h"
 
 #include "base/message_loop.h"
 #include "base/observer_list.h"
-#include "chrome/browser/browser_thread.h"
 #include "chrome/browser/chromeos/brightness_bubble.h"
 #include "chrome/browser/chromeos/volume_bubble.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
+#include "content/browser/browser_thread.h"
 
 namespace chromeos {
 
 class BrightnessLibraryImpl : public BrightnessLibrary {
  public:
   BrightnessLibraryImpl() : brightness_connection_(NULL) {
     if (CrosLibrary::Get()->EnsureLoaded())
       Init();
   }
 
@@ skipping 61 matching lines @@
   if (stub)
     return new BrightnessLibraryStubImpl();
   else
     return new BrightnessLibraryImpl();
 }
 
 }  // namespace chromeos
 
 // Needed for NewRunnableMethod() call above.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::BrightnessLibraryImpl);