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

chrome/browser/chrome_browser_main_win.h

Index: chrome/browser/chrome_browser_main_win.h
===================================================================
--- chrome/browser/chrome_browser_main_win.h	(revision 169477)
+++ chrome/browser/chrome_browser_main_win.h	(working copy)
@@ -11,7 +11,6 @@
 #include "chrome/browser/chrome_browser_main.h"
 
 class CommandLine;
-class MetroViewerProcessHost;
 
 namespace chrome {
 class RemovableDeviceNotificationsWindowWin;
@@ -70,9 +69,6 @@
  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);
 };