Part 2 of base::IDMap refactor to eliminate IDMapOwnPointer/IDMapExternalPointer modes

chrome/browser/media/cast_transport_host_filter.h

Index: chrome/browser/media/cast_transport_host_filter.h
diff --git a/chrome/browser/media/cast_transport_host_filter.h b/chrome/browser/media/cast_transport_host_filter.h
index c83b6ee5d1e9f3d637ff70a2f883e7d2f0e798b4..82aac94c4c3fb8c358d6511376d135d0fe05db93 100644
--- a/chrome/browser/media/cast_transport_host_filter.h
+++ b/chrome/browser/media/cast_transport_host_filter.h
@@ -93,7 +93,7 @@ class CastTransportHostFilter : public content::BrowserMessageFilter {
       int32_t channel_id,
       const std::vector<media::cast::FrameEvent>& events);
 
-  IDMap<media::cast::CastTransport, IDMapOwnPointer> id_map_;
+  IDMap<std::unique_ptr<media::cast::CastTransport>> id_map_;
 
   // Clock used by Cast transport.
   base::DefaultTickClock clock_;
@@ -105,7 +105,7 @@ class CastTransportHostFilter : public content::BrowserMessageFilter {
 
   // This map records all active remoting senders. It uses the unique RTP
   // stream ID as the key.
-  IDMap<CastRemotingSender, IDMapOwnPointer> remoting_sender_map_;
+  IDMap<std::unique_ptr<CastRemotingSender>> remoting_sender_map_;
 
   // This map stores all active remoting streams for each channel. It uses the
   // channel ID as the key.