Realigning the WeakPtrFactory initialization order in chrome/ui folder

chrome/browser/ui/ash/system_tray_delegate_chromeos.h

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos.h
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos.h b/chrome/browser/ui/ash/system_tray_delegate_chromeos.h
index ad08f8b13cb09d52ea87c8940a47e4ead462c80a..779a8ed421f8eb906dbe75c6500b2b121374f86b 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos.h
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos.h
@@ -235,7 +235,6 @@ class SystemTrayDelegateChromeOS
   void OnAccessibilityStatusChanged(
       const AccessibilityStatusEventDetails& details);
 
-  base::WeakPtrFactory<SystemTrayDelegateChromeOS> weak_ptr_factory_;
   scoped_ptr<content::NotificationRegistrar> registrar_;
   scoped_ptr<PrefChangeRegistrar> local_state_registrar_;
   scoped_ptr<PrefChangeRegistrar> user_pref_registrar_;
@@ -258,6 +257,8 @@ class SystemTrayDelegateChromeOS
   base::ScopedPtrHashMap<std::string, ash::tray::UserAccountsDelegate>
       accounts_delegates_;
 
+  base::WeakPtrFactory<SystemTrayDelegateChromeOS> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegateChromeOS);
 };