Move Extension into extensions namespace

chrome/browser/background/background_mode_manager_gtk.cc

 // Copyright (c) 2012 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 <unistd.h>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/nix/xdg_util.h"
 #include "chrome/browser/background/background_mode_manager.h"
 #include "chrome/browser/shell_integration_linux.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/common/auto_start_linux.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::BrowserThread;
+using extensions::Extension;
 
 namespace {
 
 // TODO(rickcam): Bug 56280: Share implementation with ShellIntegration
 void EnableLaunchOnStartupCallback() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   scoped_ptr<base::Environment> environment(base::Environment::Create());
   scoped_ptr<chrome::VersionInfo> version_info(new chrome::VersionInfo());
 
   std::string wrapper_script;
@@ skipping 41 matching lines @@
   // TODO(atwilson): Display a platform-appropriate notification here.
   // http://crbug.com/74970
 }
 
 string16 BackgroundModeManager::GetPreferencesMenuLabel() {
   string16 result = gtk_util::GetStockPreferencesMenuLabel();
   if (!result.empty())
     return result;
   return l10n_util::GetStringUTF16(IDS_PREFERENCES);
 }