Make the fuchsia mojo/public repo the source of truth.

mojo/public/java/system/src/org/chromium/mojo/system/RunLoop.java

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.mojo.system;
-
-import java.io.Closeable;
-
-/**
- * Definition of a run loop.
- */
-public interface RunLoop extends Closeable {
-    /**
-     * Start the run loop. It will continue until quit() is called.
-     */
-    public void run();
-
-    /**
-     * Start the run loop and stop it as soon as no task is present in the work queue.
-     */
-    public void runUntilIdle();
-
-    /*
-     * Quit the currently running run loop.
-     */
-    public void quit();
-
-    /**
-     * Add a runnable to the queue of tasks.
-     * @param runnable Callback to be executed by the run loop.
-     * @param delay Delay, in MojoTimeTicks (microseconds) before the callback should
-     * be executed.
-     */
-    public void postDelayedTask(Runnable runnable, long delay);
-
-    /**
-     * Destroy the run loop and deregister it from Core.
-     */
-    @Override
-    public abstract void close();
-}