Chrome sync: Put WeakPtrFactory members at the end

sync/internal_api/js_mutation_event_observer.h

 // Copyright 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.
 
 #ifndef SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_
 #define SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 37 matching lines @@
       int64 write_transaction_id,
       const ImmutableChangeRecordList& changes) OVERRIDE;
   virtual void OnChangesComplete(ModelType model_type) OVERRIDE;
 
   // syncable::TransactionObserver implementation.
   virtual void OnTransactionWrite(
       const syncable::ImmutableWriteTransactionInfo& write_transaction_info,
       ModelTypeSet models_with_changes) OVERRIDE;
 
  private:
-  base::WeakPtrFactory<JsMutationEventObserver> weak_ptr_factory_;
   WeakHandle<JsEventHandler> event_handler_;
 
   void HandleJsEvent(
     const tracked_objects::Location& from_here,
     const std::string& name, const JsEventDetails& details);
 
+  base::WeakPtrFactory<JsMutationEventObserver> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(JsMutationEventObserver);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_