Auto merge of #20413 - christianpoveda:issue_20344, r=jdm

TextDecoder's Decode now receives a BufferSource as input

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r? jdm

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #20344 (github issue number if applicable).

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components/script/dom/webidls/TextDecoder.webidl

@@ -5,15 +5,18 @@
 // https://encoding.spec.whatwg.org/#interface-textdecoder
 dictionary TextDecoderOptions {
   boolean fatal = false;
-  //boolean ignoreBOM = false;
+  // boolean ignoreBOM = false;
+};
+
+dictionary TextDecodeOptions {
+  // boolean stream = false;
 };
 
 [Constructor(optional DOMString label = "utf-8", optional TextDecoderOptions options), Exposed=(Window,Worker)]
 interface TextDecoder {
   readonly attribute DOMString encoding;
   readonly attribute boolean fatal;
-  //readonly attribute boolean ignoreBOM;
-  //USVString decode(optional BufferSource input, optional TextDecodeOptions options);
+  // readonly attribute boolean ignoreBOM;
   [Throws]
-  USVString decode(optional object input);
+  USVString decode(optional BufferSource input, optional TextDecodeOptions options);
 };