Flip default value of `__uniqueWebWorkerExtensionHostOrigin` to `true` (#134234)

src/vs/workbench/services/extensions/browser/webWorkerExtensionHost.ts

@@ -93,7 +93,11 @@ export class WebWorkerExtensionHost extends Disposable implements IExtensionHost
 
 		const forceHTTPS = (location.protocol === 'https:');
 
-		if (this._environmentService.options && this._environmentService.options.__uniqueWebWorkerExtensionHostOrigin) {
+		let uniqueWebWorkerExtensionHostOrigin = true;
+		if (this._environmentService.options && typeof this._environmentService.options.__uniqueWebWorkerExtensionHostOrigin !== 'undefined') {
+			uniqueWebWorkerExtensionHostOrigin = this._environmentService.options.__uniqueWebWorkerExtensionHostOrigin;
+		}
+		if (uniqueWebWorkerExtensionHostOrigin) {
 			const webEndpointUrlTemplate = this._productService.webEndpointUrlTemplate;
 			const commit = this._productService.commit;
 			const quality = this._productService.quality;

src/vs/workbench/workbench.web.api.ts

@@ -366,7 +366,7 @@ interface IWorkbenchConstructionOptions {
 	/**
 	 * [TEMPORARY]: This will be removed soon.
 	 * Use an unique origin for the web worker extension host.
-	 * Defaults to false.
+	 * Defaults to true.
 	 */
 	readonly __uniqueWebWorkerExtensionHostOrigin?: boolean;