Mandate unique_ptr for base::IDMap in IDMapOwnPointer mode.

chrome/browser/media/cast_transport_host_filter.cc

Index: chrome/browser/media/cast_transport_host_filter.cc
diff --git a/chrome/browser/media/cast_transport_host_filter.cc b/chrome/browser/media/cast_transport_host_filter.cc
index be9f8b746e10f97734e5cf5187db3f55f9b704b2..138b02402500869f21cde24fec572b68abb8fdcf 100644
--- a/chrome/browser/media/cast_transport_host_filter.cc
+++ b/chrome/browser/media/cast_transport_host_filter.cc
@@ -176,7 +176,7 @@ void CastTransportHostFilter::OnNew(int32_t channel_id,
           base::MakeUnique<TransportClient>(channel_id, this),
           std::move(udp_transport), base::ThreadTaskRunnerHandle::Get());
   transport->SetOptions(options);
-  id_map_.AddWithID(transport.release(), channel_id);
+  id_map_.AddWithID(std::move(transport), channel_id);
 }
 
 void CastTransportHostFilter::OnDelete(int32_t channel_id) {
@@ -215,7 +215,7 @@ void CastTransportHostFilter::OnInitializeStream(
         config.rtp_payload_type == media::cast::RtpPayloadType::REMOTE_VIDEO) {
       // Create CastRemotingSender for this RTP stream.
       remoting_sender_map_.AddWithID(
-          new CastRemotingSender(
+          base::MakeUnique<CastRemotingSender>(
               transport, config, kSendEventsInterval,
               base::Bind(&CastTransportHostFilter::OnCastRemotingSenderEvents,
                          weak_factory_.GetWeakPtr(), channel_id)),