AudioContext.decodeAudioData returns a Promise

LayoutTests/webaudio/decode-audio-data-promise-expected.txt

Index: LayoutTests/webaudio/decode-audio-data-promise-expected.txt
diff --git a/LayoutTests/webaudio/decode-audio-data-promise-expected.txt b/LayoutTests/webaudio/decode-audio-data-promise-expected.txt
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+Basic tests for decodeAudioData promise.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS decodeAudioData(null) correctly rejected promise: NotSupportedError: invalid ArrayBuffer for audioData.
+PASS Correctly succeeded in decoding resources/media/24bit-44khz.wav
+PASS Correctly failed to decode resources/media/invalid-audio-file.txt: EncodingError: Unable to decode audio data
+PASS Decoding valid file: Promise and successCallback succeeded with identical buffers
+PASS Decoding invalid file: Promise correctly rejected and errorCallback correctly invoked: EncodingError: Unable to decode audio data
+PASS Correctly decoded data after the context has been closed
+PASS successfullyParsed is true
+
+TEST COMPLETE
+