[dart:html] Add track event to RTCPeerConnection

trackEvents and onTrack were not being generated by the event
generation and should be added to the allowlist.

Change-Id: I5bc6bcc17c56b26d7fc43e69e4867532ab1b80a2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151043
Reviewed-by: Vijay Menon <vsm@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Srujan Gaddam <srujzs@google.com>

sdk/lib/html/dart2js/html_dart2js.dart

@@ -26792,6 +26792,15 @@ class RtcPeerConnection extends EventTarget {
   static const EventStreamProvider<Event> signalingStateChangeEvent =
       const EventStreamProvider<Event>('signalingstatechange');
 
+  /**
+   * Static factory designed to expose `track` events to event
+   * handlers that are not necessarily instances of [RtcPeerConnection].
+   *
+   * See [EventStreamProvider] for usage information.
+   */
+  static const EventStreamProvider<RtcTrackEvent> trackEvent =
+      const EventStreamProvider<RtcTrackEvent>('track');
+
   String get iceConnectionState native;
 
   String get iceGatheringState native;
@@ -26923,6 +26932,9 @@ class RtcPeerConnection extends EventTarget {
   /// Stream of `signalingstatechange` events handled by this [RtcPeerConnection].
   Stream<Event> get onSignalingStateChange =>
       signalingStateChangeEvent.forTarget(this);
+
+  /// Stream of `track` events handled by this [RtcPeerConnection].
+  Stream<RtcTrackEvent> get onTrack => trackEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a

sdk_nnbd/lib/html/dart2js/html_dart2js.dart

@@ -26837,6 +26837,15 @@ class RtcPeerConnection extends EventTarget {
   static const EventStreamProvider<Event> signalingStateChangeEvent =
       const EventStreamProvider<Event>('signalingstatechange');
 
+  /**
+   * Static factory designed to expose `track` events to event
+   * handlers that are not necessarily instances of [RtcPeerConnection].
+   *
+   * See [EventStreamProvider] for usage information.
+   */
+  static const EventStreamProvider<RtcTrackEvent> trackEvent =
+      const EventStreamProvider<RtcTrackEvent>('track');
+
   String get iceConnectionState native;
 
   String get iceGatheringState native;
@@ -26968,6 +26977,9 @@ class RtcPeerConnection extends EventTarget {
   /// Stream of `signalingstatechange` events handled by this [RtcPeerConnection].
   Stream<Event> get onSignalingStateChange =>
       signalingStateChangeEvent.forTarget(this);
+
+  /// Stream of `track` events handled by this [RtcPeerConnection].
+  Stream<RtcTrackEvent> get onTrack => trackEvent.forTarget(this);
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a

tools/dom/docs/docs.json

@@ -2837,6 +2837,9 @@
         "onsignalingstatechange": [
           "/// Stream of `signalingstatechange` events handled by this [RtcPeerConnection]."
         ],
+        "ontrack": [
+          "/// Stream of `track` events handled by this [RtcPeerConnection]."
+        ],
         "removestreamEvent": [
           "/**",
           "   * Static factory designed to expose `removestream` events to event",
@@ -2852,6 +2855,14 @@
           "   *",
           "   * See [EventStreamProvider] for usage information.",
           "   */"
+        ],
+        "trackEvent": [
+          "/**",
+          "   * Static factory designed to expose `track` events to event",
+          "   * handlers that are not necessarily instances of [RtcPeerConnection].",
+          "   *",
+          "   * See [EventStreamProvider] for usage information.",
+          "   */"
         ]
       }
     },

tools/dom/scripts/htmleventgenerator.py

@@ -210,6 +210,7 @@ _html_event_types = monitored.Dict(
         'RTCPeerConnection.removestream': ('removeStream', 'MediaStreamEvent'),
         'RTCPeerConnection.signalingstatechange':
         ('signalingStateChange', 'Event'),
+        'RTCPeerConnection.track': ('track', 'RtcTrackEvent'),
         'ScriptProcessorNode.audioprocess':
         ('audioProcess', 'AudioProcessingEvent'),
         'ServiceWorkerGlobalScope.activate': ('activate', 'Event'),