Move BrowserThread to content namespace.

chrome/browser/printing/print_system_task_proxy.h

 // 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.
 
 #ifndef CHROME_BROWSER_PRINTING_PRINT_SYSTEM_TASK_PROXY_H_
 #define CHROME_BROWSER_PRINTING_PRINT_SYSTEM_TASK_PROXY_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 19 matching lines @@
 // |options| will be updated if the custom settings for |printer_name| are
 // found, otherwise nothing is done.
 // NOTE: This function is declared here so it can be exposed for unit testing.
 void parse_lpoptions(const FilePath& filepath, const std::string& printer_name,
     int* num_options, cups_option_t** options);
 }  // namespace printing_internal
 
 #endif
 
 class PrintSystemTaskProxy
-    : public base::RefCountedThreadSafe<PrintSystemTaskProxy,
-                                        BrowserThread::DeleteOnUIThread> {
+    : public base::RefCountedThreadSafe<
+          PrintSystemTaskProxy, content::BrowserThread::DeleteOnUIThread> {
  public:
   PrintSystemTaskProxy(const base::WeakPtr<PrintPreviewHandler>& handler,
                        printing::PrintBackend* print_backend,
                        bool has_logged_printers_count);
 
   void GetDefaultPrinter();
 
   void EnumeratePrinters();
 
   void GetPrinterCapabilities(const std::string& printer_name);
 
  private:
-  friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
+  friend struct content::BrowserThread::DeleteOnThread<
+      content::BrowserThread::UI>;
   friend class DeleteTask<PrintSystemTaskProxy>;
 
   void SendDefaultPrinter(const base::StringValue* default_printer,
                           const base::StringValue* cloud_print_data);
   void SetupPrinterList(base::ListValue* printers);
   void SendPrinterCapabilities(base::DictionaryValue* settings_info);
 
   ~PrintSystemTaskProxy();
 
   base::WeakPtr<PrintPreviewHandler> handler_;
 
   scoped_refptr<printing::PrintBackend> print_backend_;
 
   bool has_logged_printers_count_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintSystemTaskProxy);
 };
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_SYSTEM_TASK_PROXY_H_