[Sync] Pass ModelTypeSet by value everywhere

sync/internal_api/sync_manager_impl.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 SYNC_INTERNAL_API_SYNC_MANAGER_H_
 #define SYNC_INTERNAL_API_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 68 matching lines @@
       Encryptor* encryptor,
       UnrecoverableErrorHandler* unrecoverable_error_handler,
       ReportUnrecoverableErrorFunction
           report_unrecoverable_error_function) OVERRIDE;
   virtual void ThrowUnrecoverableError() OVERRIDE;
   virtual ModelTypeSet InitialSyncEndedTypes() OVERRIDE;
   virtual ModelTypeSet GetTypesWithEmptyProgressMarkerToken(
       ModelTypeSet types) OVERRIDE;
   virtual bool PurgePartiallySyncedTypes() OVERRIDE;
   virtual void UpdateCredentials(const SyncCredentials& credentials) OVERRIDE;
-  virtual void UpdateEnabledTypes(
-      const ModelTypeSet& enabled_types) OVERRIDE;
+  virtual void UpdateEnabledTypes(ModelTypeSet enabled_types) OVERRIDE;
   virtual void RegisterInvalidationHandler(
       InvalidationHandler* handler) OVERRIDE;
   virtual void UpdateRegisteredInvalidationIds(
       InvalidationHandler* handler,
       const ObjectIdSet& ids) OVERRIDE;
   virtual void UnregisterInvalidationHandler(
       InvalidationHandler* handler) OVERRIDE;
   virtual void StartSyncingNormally(
       const ModelSafeRoutingInfo& routing_info) OVERRIDE;
   virtual void ConfigureSyncer(
       ConfigureReason reason,
-      const ModelTypeSet& types_to_config,
+      ModelTypeSet types_to_config,
       const ModelSafeRoutingInfo& new_routing_info,
       const base::Closure& ready_task,
       const base::Closure& retry_task) OVERRIDE;
   virtual void AddObserver(SyncManager::Observer* observer) OVERRIDE;
   virtual void RemoveObserver(SyncManager::Observer* observer) OVERRIDE;
   virtual SyncStatus GetDetailedStatus() const OVERRIDE;
   virtual void SaveChanges() OVERRIDE;
   virtual void StopSyncingForShutdown(const base::Closure& callback) OVERRIDE;
   virtual void ShutdownOnSyncThread() OVERRIDE;
   virtual UserShare* GetUserShare() OVERRIDE;
@@ skipping 269 matching lines @@
   // changing passphrases, and in general handles sync-specific interactions
   // with the cryptographer.
   scoped_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNC_MANAGER_H_