Merge from vscode 966b87dd4013be1a9c06e2b8334522ec61905cc2 (#4696)

src/vs/base/common/async.ts

@@ -765,3 +765,19 @@ export class IdleValue<T> {
 }
 
 //#endregion
+
+export async function retry<T>(task: ITask<Promise<T>>, delay: number, retries: number): Promise<T> {
+	let lastError: Error | undefined;
+
+	for (let i = 0; i < retries; i++) {
+		try {
+			return await task();
+		} catch (error) {
+			lastError = error;
+
+			await timeout(delay);
+		}
+	}
+
+	return Promise.reject(lastError);
+}