Convert //sync from scoped_ptr to std::unique_ptr

sync/internal_api/public/engine/model_safe_worker.h

Index: sync/internal_api/public/engine/model_safe_worker.h
diff --git a/sync/internal_api/public/engine/model_safe_worker.h b/sync/internal_api/public/engine/model_safe_worker.h
index bc3f6e057cc87021a1aed275fc5214f112eb4a40..1e016a4881be9a875accdd5b8861c564e3d3669c 100644
--- a/sync/internal_api/public/engine/model_safe_worker.h
+++ b/sync/internal_api/public/engine/model_safe_worker.h
@@ -6,12 +6,12 @@
 #define SYNC_INTERNAL_API_PUBLIC_ENGINE_MODEL_SAFE_WORKER_H_
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
@@ -152,7 +152,7 @@ class SYNC_EXPORT ModelSafeWorker
 typedef std::map<ModelType, ModelSafeGroup> ModelSafeRoutingInfo;
 
 // Caller takes ownership of return value.
-SYNC_EXPORT scoped_ptr<base::DictionaryValue> ModelSafeRoutingInfoToValue(
+SYNC_EXPORT std::unique_ptr<base::DictionaryValue> ModelSafeRoutingInfoToValue(
     const ModelSafeRoutingInfo& routing_info);
 
 SYNC_EXPORT std::string ModelSafeRoutingInfoToString(