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diff --git a/chromium/third_party/node/node_modules/lit-html/directives/private-async-helpers.d.ts b/chromium/third_party/node/node_modules/lit-html/directives/private-async-helpers.d.ts
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+/**
+ * @license
+ * Copyright 2021 Google LLC
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+/**
+ * Helper to iterate an AsyncIterable in its own closure.
+ * @param iterable The iterable to iterate
+ * @param callback The callback to call for each value. If the callback returns
+ * `false`, the loop will be broken.
+ */
+export declare const forAwaitOf: <T>(iterable: AsyncIterable<T>, callback: (value: T) => Promise<boolean>) => Promise<void>;
+/**
+ * Holds a reference to an instance that can be disconnected and reconnected,
+ * so that a closure over the ref (e.g. in a then function to a promise) does
+ * not strongly hold a ref to the instance. Approximates a WeakRef but must
+ * be manually connected & disconnected to the backing instance.
+ */
+export declare class PseudoWeakRef<T> {
+    private _ref?;
+    constructor(ref: T);
+    /**
+     * Disassociates the ref with the backing instance.
+     */
+    disconnect(): void;
+    /**
+     * Reassociates the ref with the backing instance.
+     */
+    reconnect(ref: T): void;
+    /**
+     * Retrieves the backing instance (will be undefined when disconnected)
+     */
+    deref(): T | undefined;
+}
+/**
+ * A helper to pause and resume waiting on a condition in an async function
+ */
+export declare class Pauser {
+    private _promise?;
+    private _resolve?;
+    /**
+     * When paused, returns a promise to be awaited; when unpaused, returns
+     * undefined. Note that in the microtask between the pauser being resumed
+     * an an await of this promise resolving, the pauser could be paused again,
+     * hence callers should check the promise in a loop when awaiting.
+     * @returns A promise to be awaited when paused or undefined
+     */
+    get(): Promise<void> | undefined;
+    /**
+     * Creates a promise to be awaited
+     */
+    pause(): void;
+    /**
+     * Resolves the promise which may be awaited
+     */
+    resume(): void;
+}
+//# sourceMappingURL=private-async-helpers.d.ts.map
+\ No newline at end of file