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

chrome/browser/chromeos/login/image_decoder.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/login/image_decoder.h"
 
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/browser_thread.h"
+#include "content/browser/browser_thread.h"
 
 namespace chromeos {
 
 ImageDecoder::ImageDecoder(Delegate* delegate,
                            const std::vector<unsigned char>& image_data)
     : delegate_(delegate),
       image_data_(image_data) {
 }
 
 void ImageDecoder::Start() {
@@ skipping 18 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   UtilityProcessHost* utility_process_host =
       new UtilityProcessHost(rdh,
                              this,
                              BrowserThread::UI);
   utility_process_host->StartImageDecoding(image_data);
 }
 
 }  // namespace chromeos