From 3eb4a21dedfcacb708be731b5c906a3363eff046 Mon Sep 17 00:00:00 2001
From: Mark Hills <mark@xwax.org>
Date: Fri, 17 Mar 2023 16:41:56 +0000
Subject: [PATCH 1/3] Correct RTCRtpSender.addTrack, as the stream is optional

The compiler's definition of this function requires one or more streams,
and differs from references [1][2] which require zero or more.

Code using addTrack(track) is valid, tested in Chromium 113.0.5659.0 and
later.

[1] https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/addTrack
[2] https://www.w3.org/TR/webrtc/#ref-for-dom-rtcpeerconnection-addtrack-8

Fixes: https://github.com/google/closure-compiler/issues/4071
---
 externs/browser/w3c_rtc.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/externs/browser/w3c_rtc.js b/externs/browser/w3c_rtc.js
index 6c5559fdba6..0620fc6561e 100644
--- a/externs/browser/w3c_rtc.js
+++ b/externs/browser/w3c_rtc.js
@@ -3688,11 +3688,10 @@ RTCPeerConnection.prototype.removeStream = function(stream) {};
 
 /**
  * @param {!MediaStreamTrack} track
- * @param {!MediaStream} stream
- * @param {...MediaStream} var_args Additional streams.
+ * @param {...MediaStream} var_args Optional streams.
  * @return {!RTCRtpSender}
  */
-RTCPeerConnection.prototype.addTrack = function(track, stream, var_args) {};
+RTCPeerConnection.prototype.addTrack = function(track, var_args) {};
 
 /**
  * @param {!MediaStreamTrack|string} trackOrKind

From 837ec1911aac38243873fc5d55df9f92541d7b89 Mon Sep 17 00:00:00 2001
From: Mark Hills <mark@xwax.org>
Date: Fri, 22 Sep 2023 17:37:08 +0100
Subject: [PATCH 2/3] Correct RTCTrackEvent which inherits from Event

This spec [1] is consistent with the MDN documentation [2] in this
regard.

[1] https://www.w3.org/TR/webrtc/#rtctrackevent
[2] https://developer.mozilla.org/en-US/docs/Web/API/RTCTrackEvent
---
 externs/browser/w3c_rtc.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/externs/browser/w3c_rtc.js b/externs/browser/w3c_rtc.js
index 0620fc6561e..8e95b382320 100644
--- a/externs/browser/w3c_rtc.js
+++ b/externs/browser/w3c_rtc.js
@@ -1836,6 +1836,7 @@ ImageCapture.prototype.track;
  * @see https://www.w3.org/TR/webrtc/#rtctrackevent
  * @param {string} type
  * @param {!Object} eventInitDict
+ * @extends {Event}
  * @constructor
  */
 function RTCTrackEvent(type, eventInitDict) {}

From 0005e47398fe3035a1fd68058725097d3dda86f7 Mon Sep 17 00:00:00 2001
From: Mark Hills <mark@xwax.org>
Date: Fri, 21 Mar 2025 10:44:41 +0000
Subject: [PATCH 3/3] Correct RTCEncoded{Audio,Video}Frame whose member is not
 read-only

The Mozilla documentation [1][2] states this parameter is not read-only
and it this behaviour is useful for the purpose of replacing the buffer
with another one. This matches the information in [3][4].

[1] https://developer.mozilla.org/en-US/docs/Web/API/RTCEncodedAudioFrame
[2] https://developer.mozilla.org/en-US/docs/Web/API/RTCEncodedVideoFrame
[3] https://www.w3.org/TR/webrtc-encoded-transform/#RTCEncodedAudioFrame-members
[4] https://www.w3.org/TR/webrtc-encoded-transform/#RTCEncodedVideoFrame-members
---
 externs/browser/w3c_rtc.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/externs/browser/w3c_rtc.js b/externs/browser/w3c_rtc.js
index 8e95b382320..7cd4a7f9e3e 100644
--- a/externs/browser/w3c_rtc.js
+++ b/externs/browser/w3c_rtc.js
@@ -684,7 +684,7 @@ RTCEncodedVideoFrameMetadata.prototype.width;
 function RTCEncodedVideoFrame() {}
 
 /**
- * @const {!ArrayBuffer}
+ * @type {!ArrayBuffer}
  */
 RTCEncodedVideoFrame.prototype.data;
 
@@ -732,7 +732,7 @@ RTCEncodedAudioFrameMetadata.prototype.synchronizationSource;
 function RTCEncodedAudioFrame() {}
 
 /**
- * @const {!ArrayBuffer}
+ * @type {!ArrayBuffer}
  */
 RTCEncodedAudioFrame.prototype.data;