script: Move code generation and webidl files to new script_bindings crate. (#35157)

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

components/script_bindings/webidls/ReadableStream.webidl

@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://streams.spec.whatwg.org/#readablestream
+
+[Exposed=*] // [Transferable] - See Bug 1562065
+interface _ReadableStream {
+  [Throws]
+  constructor(optional object underlyingSource, optional QueuingStrategy strategy = {});
+
+  // [Throws]
+  // static ReadableStream from(any asyncIterable);
+
+  readonly attribute boolean locked;
+
+  [NewObject]
+  Promise<undefined> cancel(optional any reason);
+
+  [Throws]
+  ReadableStreamReader getReader(optional ReadableStreamGetReaderOptions options = {});
+
+  // [Throws]
+  // ReadableStream pipeThrough(ReadableWritablePair transform, optional StreamPipeOptions options = {});
+
+  // [NewObject]
+  // Promise<undefined> pipeTo(WritableStream destination, optional StreamPipeOptions options = {});
+
+  [Throws]
+  sequence<ReadableStream> tee();
+
+  // [GenerateReturnMethod]
+  // async iterable<any>(optional ReadableStreamIteratorOptions options = {});
+};
+
+enum ReadableStreamType { "bytes" };
+
+enum ReadableStreamReaderMode { "byob" };
+
+dictionary ReadableStreamGetReaderOptions {
+  ReadableStreamReaderMode mode;
+};
+
+/*
+dictionary ReadableStreamIteratorOptions {
+  boolean preventCancel = false;
+};
+
+dictionary ReadableWritablePair {
+  required ReadableStream readable;
+  required WritableStream writable;
+};
+
+dictionary StreamPipeOptions {
+  boolean preventClose = false;
+  boolean preventAbort = false;
+  boolean preventCancel = false;
+  AbortSignal signal;
+};
+*/