VideoEncoder produces no frames with latencyMode "realtime" when framerate/bitrate are not given

[youennf]

ef16bd3

VideoEncoder produces no frames with latencyMode "realtime" when framerate/bitrate are not given
https://bugs.webkit.org/show_bug.cgi?id=264894
rdar://118725549

Reviewed by Eric Carlson.

When frame rate and/or bitrate is not set, use default values for them.
For frame rate, we use 30 frames.
For bitrate, we use the max bit rate as per H264 table A.1.

* LayoutTests/http/wpt/webcodecs/h264-encoder-default-config.https.any-expected.txt: Added.
* LayoutTests/http/wpt/webcodecs/h264-encoder-default-config.https.any.html: Added.
* LayoutTests/http/wpt/webcodecs/h264-encoder-default-config.https.any.js: Added.
(async encoderTest):
(promise_test.async return):
(promise_test):
* LayoutTests/http/wpt/webcodecs/h264-encoder-default-config.https.any.worker-expected.txt: Added.
* LayoutTests/http/wpt/webcodecs/h264-encoder-default-config.https.any.worker.html: Added.
* Source/ThirdParty/libwebrtc/Source/webrtc/sdk/objc/components/video_codec/RTCVideoEncoderH264.mm:
(-[RTCVideoEncoderH264 startEncodeWithSettings:numberOfCores:]):
(-[RTCVideoEncoderH264 setBitrate:framerate:]):
(-[RTCVideoEncoderH264 setEncoderBitrateBps:frameRate:]):

Canonical link: https://commits.webkit.org/271087@main

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	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2
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	✅ 🧪 api-ios	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
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[webkit-commit-queue]

Committed 271087@main (ef16bd3): https://commits.webkit.org/271087@main

Reviewed commits have been landed. Closing PR #20842 and removing active labels.