Move BrowserThread to content namespace.

chrome/browser/printing/print_preview_message_handler.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/print_preview_message_handler.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/shared_memory.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/printing/print_view_manager.h"
 #include "chrome/browser/printing/printer_query.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/webui/print_preview_handler.h"
 #include "chrome/browser/ui/webui/print_preview_ui.h"
 #include "chrome/common/print_messages.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/content_restriction.h"
 #include "content/public/browser/browser_thread.h"
 #include "printing/page_size_margins.h"
 #include "printing/print_job_constants.h"
 
+using content::BrowserThread;
+
 namespace {
 
 void StopWorker(int document_cookie) {
   if (document_cookie <= 0)
     return;
 
   printing::PrintJobManager* print_job_manager =
       g_browser_process->print_job_manager();
   scoped_refptr<printing::PrinterQuery> printer_query;
   print_job_manager->PopPrinterQuery(document_cookie, &printer_query);
@@ skipping 204 matching lines @@
 }
 
 void PrintPreviewMessageHandler::DidStartLoading() {
   if (tab_contents()->delegate() &&
       PrintPreviewTabController::IsPrintPreviewTab(tab_contents_wrapper())) {
     tab_contents()->SetContentRestrictions(CONTENT_RESTRICTION_PRINT);
   }
 }
 
 }  // namespace printing