Revert 149576 - gdata: Make WeakPtrFactory the last parameter

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
===================================================================
--- chrome/browser/chromeos/gdata/gdata_file_system.h	(revision 149581)
+++ chrome/browser/chromeos/gdata/gdata_file_system.h	(working copy)
@@ -874,13 +874,13 @@
 
   scoped_ptr<PrefChangeRegistrar> pref_registrar_;
 
+  // WeakPtrFactory and WeakPtr bound to the UI thread.
+  base::WeakPtrFactory<GDataFileSystem> ui_weak_ptr_factory_;
+  base::WeakPtr<GDataFileSystem> ui_weak_ptr_;
+
   ObserverList<Observer> observers_;
 
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
-
-  // Note: This should remain the last member so it'll be destroyed and
-  // invalidate its weak pointers before any other members are destroyed.
-  base::WeakPtrFactory<GDataFileSystem> weak_ptr_factory_;
 };
 
 }  // namespace gdata