Revert 149576 - gdata: Make WeakPtrFactory the last parameter

chrome/browser/chromeos/gdata/gdata_operation_runner.h

Index: chrome/browser/chromeos/gdata/gdata_operation_runner.h
===================================================================
--- chrome/browser/chromeos/gdata/gdata_operation_runner.h	(revision 149581)
+++ chrome/browser/chromeos/gdata/gdata_operation_runner.h	(working copy)
@@ -69,10 +69,8 @@
 
   scoped_ptr<GDataAuthService> auth_service_;
   scoped_ptr<GDataOperationRegistry> operation_registry_;
-
-  // 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<GDataOperationRunner> weak_ptr_factory_;
+  base::WeakPtr<GDataOperationRunner> weak_ptr_bound_to_ui_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(GDataOperationRunner);
 };