Motown: Rename MediaProducer/Consumer to MediaPacketProducer/Consumer

mojo/services/media/core/interfaces/media_demux.mojom

 // Copyright 2016 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.
 
 [DartPackage="mojo_services"]
 module mojo.media;
 
 import "mojo/services/media/common/interfaces/media_metadata.mojom";
 import "mojo/services/media/common/interfaces/media_transport.mojom";
 import "mojo/services/media/common/interfaces/media_types.mojom";
 
 // Demuxes content to produce media streams.
 interface MediaDemux {
   // Special value for GetMetadata version_last_seen parameter to get the
   // current metadata immediately.
   const uint64 kInitialMetadata = 0;
 
   // Describes the demux.
   Describe() => (array<MediaType> stream_types);
 
-  // Gets the producer for the specified stream.
-  GetProducer(uint32 stream_index, MediaProducer& producer);
+  // Gets the packet producer for the specified stream.
+  GetPacketProducer(uint32 stream_index, MediaPacketProducer& packet_producer);
 
   // Gets the metadata. To get the metadata immediately, call
   // GetMetadata(kInitialMetadata). To get updates thereafter, pass the version
   // sent in the previous callback.
   GetMetadata(uint64 version_last_seen) =>
       (uint64 version, MediaMetadata? metadata);
 
   // Primes the demux and downstream components.
   Prime() => ();
 
   // Flushes the demux and downstream components.
   Flush() => ();
 
   // Seeks to the specified position, specified in nanoseconds.
   Seek(int64 position) => ();
 };