Update the picture-in-picture IDL file

interfaces/picture-in-picture.idl

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+// GENERATED CONTENT - DO NOT EDIT
+// Content of this file was automatically extracted from the
+// "Picture-in-Picture" spec.
+// See: https://wicg.github.io/picture-in-picture/
+
+partial interface HTMLVideoElement {
+  Promise<PictureInPictureWindow> requestPictureInPicture();
+
+  attribute EventHandler onenterpictureinpicture;
+  attribute EventHandler onleavepictureinpicture;
+
+  [CEReactions]
+  attribute boolean disablePictureInPicture;
+};
+
+partial interface Document {
+  readonly attribute boolean pictureInPictureEnabled;
+
+  Promise<void> exitPictureInPicture();
+};
+
+partial interface DocumentOrShadowRoot {
+  readonly attribute Element? pictureInPictureElement;
+};
+
+interface PictureInPictureWindow {
+  readonly attribute long width;
+  readonly attribute long height;
+
+  attribute EventHandler onresize;
+};

picture-in-picture/idlharness.window.js

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+// META: script=/resources/WebIDLParser.js
+// META: script=/resources/idlharness.js
+
+'use strict';
+
+// https://wicg.github.io/picture-in-picture/
+
+promise_test(async () => {
+  const srcs = ['html', 'dom', 'picture-in-picture'];
+  const [html, dom, pip] = await Promise.all(
+      srcs.map(i => fetch(`/interfaces/${i}.idl`).then(r => r.text())));
+
+  const idl_array = new IdlArray();
+  idl_array.add_idls(pip);
+  idl_array.add_dependency_idls(dom);
+  idl_array.add_dependency_idls(html);
+
+  idl_array.add_objects({
+    Document: ['document'],
+  });
+  idl_array.test();
+}, 'picture-in-picture interfaces.');