CCA: Migrate comlink related files to TypeScript

Also update comlink library from comlink.js to comlink.ts (version
4.3.1) for better typing support, since we're using TypeScript now.

Bug: b:172340451
Test: tsc compiles
Test: tast run <ip> camera.CCAUISmoke* camera.CCAUIStress*
Change-Id: I8f19bcb06da3a644c17b2197f51d02fba53381bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3292652
Reviewed-by: Shik Chen <shik@chromium.org>
Commit-Queue: Pi-Hsun Shih <pihsun@chromium.org>
Cr-Commit-Position: refs/heads/main@{#951373}

ash/webui/camera_app_ui/resources/js/externs/types.d.ts

@@ -251,9 +251,9 @@ type CreateScriptURLCallback = (input: string, arguments: any) => string;
 
 interface TrustedTypePolicy {
   readonly name: string;
-  createHTML(input: string, arguments: any): TrustedHTML;
-  createScript(input: string, arguments: any): TrustedScript;
-  createScriptURL(input: string, arguments: any): TrustedScriptURL;
+  createHTML(input: string, arguments?: any): TrustedHTML;
+  createScript(input: string, arguments?: any): TrustedScript;
+  createScriptURL(input: string, arguments?: any): TrustedScriptURL;
 }
 
 interface TrustedTypePolicyFactory {

ash/webui/camera_app_ui/resources/js/init.js → ash/webui/camera_app_ui/resources/js/init.ts

@@ -12,11 +12,12 @@
 import '/strings.m.js';
 
 import * as Comlink from './lib/comlink.js';
+import {TestBridge} from './test_bridge.js';
 
 document.addEventListener('DOMContentLoaded', async () => {
   const workerPath = '/js/test_bridge.js';
   const sharedWorker = new SharedWorker(workerPath, {type: 'module'});
-  const testBridge = Comlink.wrap(sharedWorker.port);
+  const testBridge = Comlink.wrap<TestBridge>(sharedWorker.port);
   const appWindow = await testBridge.bindWindow(window.location.href);
   // TODO(crbug.com/980846): Refactor to use a better way rather than window
   // properties to pass data to other modules.

ash/webui/camera_app_ui/resources/js/js.gni

@@ -24,9 +24,10 @@ compile_js_files = [
   "geometry.js",
   "h264.js",
   "i18n_string.js",
-  "init.js",
+  "init.ts",
   "intent.js",
-  "lib/comlink.js",
+  "lib/comlink.ts",
+  "lib/comlink_protocol.ts",
   "lib/ffmpeg.js",
   "main.js",
   "metrics.ts",
@@ -46,7 +47,7 @@ compile_js_files = [
   "models/local_storage.js",
   "models/result_saver.js",
   "models/video_processor_interface.js",
-  "models/video_saver.js",
+  "models/video_saver.ts",
   "mojo/chrome_helper.ts",
   "mojo/device_operator.js",
   "mojo/image_capture.js",
@@ -58,7 +59,7 @@ compile_js_files = [
   "snackbar.js",
   "sound.js",
   "state.js",
-  "test_bridge.js",
+  "test_bridge.ts",
   "thumbnailer.js",
   "timer.ts",
   "toast.js",
@@ -68,7 +69,7 @@ compile_js_files = [
   "untrusted_ga_helper.js",
   "untrusted_helper_interfaces.js",
   "untrusted_script_loader.js",
-  "untrusted_video_processor_helper.js",
+  "untrusted_video_processor_helper.ts",
   "util.ts",
   "views/camera_intent.js",
   "views/camera.js",