Convert //media/cast from scoped_ptr to std::unique_ptr

media/cast/logging/raw_event_subscriber_bundle.h

Index: media/cast/logging/raw_event_subscriber_bundle.h
diff --git a/media/cast/logging/raw_event_subscriber_bundle.h b/media/cast/logging/raw_event_subscriber_bundle.h
index 58ab21e6e8abaebc186d397c32294f2f6c0cb205..4df3065cb99646c1f8482733afa1f027bdb382d0 100644
--- a/media/cast/logging/raw_event_subscriber_bundle.h
+++ b/media/cast/logging/raw_event_subscriber_bundle.h
@@ -72,7 +72,7 @@ class RawEventSubscriberBundle {
       SubscribersMapByStream;
   const scoped_refptr<CastEnvironment> cast_environment_;
   SubscribersMapByStream subscribers_;
-  scoped_ptr<ReceiverTimeOffsetEstimator> receiver_offset_estimator_;
+  std::unique_ptr<ReceiverTimeOffsetEstimator> receiver_offset_estimator_;
 
   DISALLOW_COPY_AND_ASSIGN(RawEventSubscriberBundle);
 };