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/Blob.webidl

@@ -0,0 +1,29 @@
+/* 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://w3c.github.io/FileAPI/#blob
+
+[Exposed=(Window,Worker)]
+interface Blob {
+  [Throws] constructor(optional sequence<BlobPart> blobParts,
+    optional BlobPropertyBag options = {});
+
+  readonly attribute unsigned long long size;
+  readonly attribute DOMString type;
+
+  // slice Blob into byte-ranged chunks
+  Blob slice(optional [Clamp] long long start,
+             optional [Clamp] long long end,
+             optional DOMString contentType);
+
+  [NewObject, Throws] ReadableStream stream();
+  [NewObject] Promise<DOMString> text();
+  [NewObject] Promise<ArrayBuffer> arrayBuffer();
+};
+
+dictionary BlobPropertyBag {
+  DOMString type = "";
+};
+
+typedef (ArrayBuffer or ArrayBufferView or Blob or DOMString) BlobPart;