Define window.scheduler as non-optional

We used the wicg-task-scheduling types for `window.scheduler` but it
types it as optional - this is true for the general case but because we
are in Chrome we know it exists.

Unfortunately you cannot override the member from optional or not on
`Window`, so this CL removes the use of the
`@types/wicg-task-scheduling` package and reuses the code inline with
the extension to the `Window` interface making it always present.

Bug: none
Change-Id: I8399d3477f89f88e758ed31399c6256fcbd31de9
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6393155
Auto-Submit: Jack Franklin <[email protected]>
Reviewed-by: Connor Clark <[email protected]>
Commit-Queue: Connor Clark <[email protected]>

Author: jackfranklin

front_end/global_typings/global_defs.d.ts

@@ -6,3 +6,53 @@ declare module '*.css.js' {
   const styles: {cssText: string};
   export default styles;
 }
+
+// Types for the Scheduler API.
+// These are taken from
+// https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/wicg-task-scheduling
+// but modified because within Chrome we can use the API without worrying that
+// it is undefined.
+// This code is licensed under the MIT license
+/**
+ * MIT License
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE
+ */
+type PostTaskPriority = 'user-blocking'|'user-visible'|'background';
+
+interface PostTaskOptions {
+  priority?: PostTaskPriority;
+  signal?: AbortSignal;
+  delay?: number;
+}
+
+interface Scheduler {
+  yield(): Promise<void>;
+  postTask<T>(callback: () => T): Promise<T>;
+  postTask<T>(callback: () => T, options: PostTaskOptions): Promise<T>;
+}
+
+interface Window {
+  readonly scheduler: Scheduler;
+}
+
+interface WorkerGlobalScope {
+  readonly scheduler?: Scheduler;
+}

node_modules/.package-lock.json

@@ -50,7 +50,6 @@
     "@types/node": "22.10.7",
     "@types/sinon": "17.0.3",
     "@types/webidl2": "23.13.6",
-    "@types/wicg-task-scheduling": "2024.1.0",
     "@types/yargs": "17.0.33",
     "@typescript-eslint/eslint-plugin": "8.26.0",
     "@typescript-eslint/parser": "8.26.0",

node_modules/@types/wicg-task-scheduling/LICENSE

@@ -45,9 +45,6 @@
               'global_defs.d.ts'),
     # Types for W3C FileSystem API
     path.join(NODE_MODULES_DIRECTORY, '@types', 'filesystem', 'index.d.ts'),
-    # Types for wicg task scheduling API
-    path.join(NODE_MODULES_DIRECTORY, '@types', 'wicg-task-scheduling',
-              'index.d.ts'),
 ]
 
 logging.basicConfig(

node_modules/@types/wicg-task-scheduling/index.d.ts

@@ -65,8 +65,6 @@ template("ts_library") {
       devtools_location_prepend + "front_end/legacy/legacy-defs.d.ts",
       devtools_location_prepend + "front_end/global_typings/global_defs.d.ts",
       devtools_location_prepend + "node_modules/@types/filesystem/index.d.ts",
-      devtools_location_prepend +
-          "node_modules/@types/wicg-task-scheduling/index.d.ts",
     ]
 
     # When use_remoteexec=true, node actions run on remote Linux worker.