Ensure that Metro chrome in ASH is able to connect to an existing desktop chrome AURA process.

chrome/browser/chrome_browser_main_win.h

 // 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.
 
 // Contains functions used by BrowserMain() that are win32-specific.
 
 #ifndef CHROME_BROWSER_CHROME_BROWSER_MAIN_WIN_H_
 #define CHROME_BROWSER_CHROME_BROWSER_MAIN_WIN_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chrome_browser_main.h"
 
 class CommandLine;
-class MetroViewerProcessHost;
 
 namespace chrome {
 class RemovableDeviceNotificationsWindowWin;
 }  // namespace chrome
 
 
 // Handle uninstallation when given the appropriate the command-line switch.
 // If |chrome_still_running| is true a modal dialog will be shown asking the
 // user to close the other chrome instance.
 int DoUninstallTasks(bool chrome_still_running);
@@ skipping 38 matching lines @@
   // user level Chrome.
   static bool CheckMachineLevelInstall();
 
   // Sets the TranslationDelegate which provides localized strings to
   // installer_util.
   static void SetupInstallerUtilStrings();
 
  private:
   scoped_ptr<chrome::RemovableDeviceNotificationsWindowWin>
       removable_device_notifications_window_;
-#if defined(USE_AURA)
-  scoped_ptr<MetroViewerProcessHost> metro_viewer_process_host_;
-#endif
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserMainPartsWin);
 };
 
 #endif  // CHROME_BROWSER_CHROME_BROWSER_MAIN_WIN_H_