sync: Consistently refcount ModelSafeWorkers

chrome/browser/sync/glue/sync_backend_registrar.h

 // Copyright (c) 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 CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_REGISTRAR_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_REGISTRAR_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 91 matching lines @@
 
   // SyncManager::ChangeDelegate implementation.  May be called from
   // any thread.
   virtual void OnChangesApplied(
       syncer::ModelType model_type,
       int64 model_version,
       const syncer::BaseTransaction* trans,
       const syncer::ImmutableChangeRecordList& changes) OVERRIDE;
   virtual void OnChangesComplete(syncer::ModelType model_type) OVERRIDE;
 
-  void GetWorkers(std::vector<syncer::ModelSafeWorker*>* out);
+  void GetWorkers(std::vector<scoped_refptr<syncer::ModelSafeWorker> >* out);
   void GetModelSafeRoutingInfo(syncer::ModelSafeRoutingInfo* out);
 
   // syncer::WorkerLoopDestructionObserver implementation.
   virtual void OnWorkerLoopDestroyed(syncer::ModelSafeGroup group) OVERRIDE;
 
   // Release ownership of |sync_thread_|. Called when sync is disabled.
   scoped_ptr<base::Thread> ReleaseSyncThread();
 
   // Unregister workers from loop destruction observation.
   void Shutdown();
@@ skipping 62 matching lines @@
   // e.g. Shutdown() depends on |lock_|, SyncManager::Init() depends on
   // workers, etc.
   scoped_ptr<base::Thread> sync_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendRegistrar);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_REGISTRAR_H_