components: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

components/sync_driver/shared_change_processor.h

 // Copyright 2014 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 COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_
 #define COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_
 
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "components/sync_driver/data_type_error_handler.h"
 #include "sync/api/sync_change_processor.h"
 #include "sync/api/sync_data.h"
 #include "sync/api/sync_error.h"
 #include "sync/api/sync_error_factory.h"
 #include "sync/api/sync_merge_result.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
 
 namespace syncer {
@@ skipping 94 matching lines @@
   // processor return errors. This enables us to shut down the syncer without
   // having to wait for possibly non-UI thread datatypes to complete work.
   mutable base::Lock monitor_lock_;
   bool disconnected_;
 
   // The sync datatype we were last connected to.
   syncer::ModelType type_;
 
   // The frontend / UI MessageLoop this object is constructed on. May also be
   // destructed and/or disconnected on this loop, see ~SharedChangeProcessor.
-  const scoped_refptr<const base::MessageLoopProxy> frontend_loop_;
+  const scoped_refptr<const base::SingleThreadTaskRunner> frontend_task_runner_;
 
   // The loop that all methods except the constructor, destructor, and
   // Disconnect() should be called on.  Set in Connect().
-  scoped_refptr<base::MessageLoopProxy> backend_loop_;
+  scoped_refptr<base::SingleThreadTaskRunner> backend_task_runner_;
 
   // Used only on |backend_loop_|.
   GenericChangeProcessor* generic_change_processor_;
 
   DataTypeErrorHandler* error_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedChangeProcessor);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_