Move BrowserThread to content namespace.

chrome/browser/printing/printing_message_filter.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 "chrome/browser/printing/printing_message_filter.h"
 
 #include <string>
 
 #include "base/process_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/printing/printer_query.h"
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/common/print_messages.h"
 
 #if defined(OS_CHROMEOS)
 #include <fcntl.h>
 
 #include <map>
 
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "chrome/browser/printing/print_dialog_cloud.h"
 #else
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #endif
 
+using content::BrowserThread;
+
 namespace {
 
 #if defined(OS_CHROMEOS)
 typedef std::map<int, FilePath> SequenceToPathMap;
 
 struct PrintingSequencePathMap {
   SequenceToPathMap map;
   int sequence;
 };
 
@@ skipping 281 matching lines @@
   }
 }
 
 void PrintingMessageFilter::OnCheckForCancel(const std::string& preview_ui_addr,
                                              int preview_request_id,
                                              bool* cancel) {
   PrintPreviewUI::GetCurrentPrintPreviewStatus(preview_ui_addr,
                                                preview_request_id,
                                                cancel);
 }