build(bazel): Turning on strictPropertyInitialization for Angular. (#24572)

All errors for existing fields have been detected and suppressed with a
`!` assertion.

Issue/24571 is tracking proper clean up of those instances.

One-line change required in ivy/compilation.ts, because it appears that
the new syntax causes tsickle emitted node to no longer track their
original sourceFiles.

PR Close #24572

packages/platform-webworker/src/web_workers/shared/post_message_bus.ts

@@ -18,7 +18,8 @@ export interface PostMessageTarget {
 }
 
 export class PostMessageBusSink implements MessageBusSink {
-  private _zone: NgZone;
+  // TODO(issue/24571): remove '!'.
+  private _zone !: NgZone;
   private _channels: {[key: string]: _Channel} = {};
   private _messageBuffer: Array<Object> = [];
 
@@ -67,7 +68,8 @@ export class PostMessageBusSink implements MessageBusSink {
 }
 
 export class PostMessageBusSource implements MessageBusSource {
-  private _zone: NgZone;
+  // TODO(issue/24571): remove '!'.
+  private _zone !: NgZone;
   private _channels: {[key: string]: _Channel} = {};
 
   constructor(eventTarget?: EventTarget) {

packages/platform-webworker/src/web_workers/ui/renderer.ts

@@ -17,7 +17,8 @@ import {EventDispatcher} from '../ui/event_dispatcher';
 
 @Injectable()
 export class MessageBasedRenderer2 {
-  private _eventDispatcher: EventDispatcher;
+  // TODO(issue/24571): remove '!'.
+  private _eventDispatcher !: EventDispatcher;
 
   constructor(
       private _brokerFactory: ServiceMessageBrokerFactory, private _bus: MessageBus,

packages/platform-webworker/src/web_workers/worker/platform_location.ts

@@ -21,7 +21,8 @@ export class WebWorkerPlatformLocation extends PlatformLocation {
   private _location: LocationType = null !;
   private _channelSource: EventEmitter<Object>;
   public initialized: Promise<any>;
-  private initializedResolve: () => void;
+  // TODO(issue/24571): remove '!'.
+  private initializedResolve !: () => void;
 
   constructor(
       brokerFactory: ClientMessageBrokerFactory, bus: MessageBus, private _serializer: Serializer) {

packages/platform-webworker/src/web_workers/worker/renderer.ts

@@ -15,7 +15,8 @@ import {RenderStore} from '../shared/render_store';
 import {Serializer, SerializerTypes} from '../shared/serializer';
 
 export class NamedEventEmitter {
-  private _listeners: Map<string, Function[]>;
+  // TODO(issue/24571): remove '!'.
+  private _listeners !: Map<string, Function[]>;
 
   listen(eventName: string, callback: Function) { this._getListeners(eventName).push(callback); }
 

packages/platform-webworker/src/worker_render.ts

@@ -29,8 +29,10 @@ import {MessageBasedRenderer2} from './web_workers/ui/renderer';
  */
 @Injectable()
 export class WebWorkerInstance {
-  public worker: Worker;
-  public bus: MessageBus;
+  // TODO(issue/24571): remove '!'.
+  public worker !: Worker;
+  // TODO(issue/24571): remove '!'.
+  public bus !: MessageBus;
 
   /** @internal */
   public init(worker: Worker, bus: MessageBus) {

packages/platform-webworker/test/web_workers/shared/message_bus_util.ts

@@ -23,7 +23,8 @@ export function createConnectedMessageBus(): MessageBus {
 }
 
 class MockPostMessage {
-  private _listener: EventListener;
+  // TODO(issue/24571): remove '!'.
+  private _listener !: EventListener;
 
   addEventListener(type: string, listener: EventListener, useCapture?: boolean): void {
     if (type === 'message') {