Support new-style Mojo JS core API on IOS.

ios/web/webui/resources/handle_util.js

-// Copyright 2016 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.
-
-// Module "ios/mojo/public/js/handle_util"
-//
-// This module provides utilities to work with mojo handles.
-// JavaScript and native code use different types for Mojo handles.
-// In JavaScript handles are objects of type
-// {nativeHandle: number, isValidMojoHandle: bool}. In native code handle is
-// an integer and corresponds to {@code nativeHandle } field of JavaScript
-// handle object.
-
-define("ios/mojo/public/js/handle_util", [], function() {
-
-  /**
-   * Returns JavaScript handle from the given native handle.
-   * @param {!MojoHandle} Native mojo handle to convert.
-   * @return {!Object} JavaScript Mojo handle.
-   */
-  function getJavaScriptHandle(nativeHandle) {
-    return {
-      nativeHandle: nativeHandle,
-      isValidMojoHandle: true
-    };
-  };
-
-  /**
-   * Returns native handle from the given JavaScript handle.
-   * @param {Object} javaScriptHandle Handle to convert.
-   * @return {MojoHandle} native Mojo handle.
-   */
-  function getNativeHandle(javaScriptHandle) {
-    return javaScriptHandle ? javaScriptHandle.nativeHandle : null;
-  };
-
-  /**
-   * Returns native handles from the given JavaScript handles.
-   * @param {!Array<Object>} javaScriptHandles Handles to unwrap.
-   * @return {!Array<MojoHandle>} array of native Mojo handles.
-   */
-  function getNativeHandles(javaScriptHandles) {
-    return javaScriptHandles.map(function(handle) {
-      return getNativeHandle(handle);
-    });
-  };
-
-  /**
-   * @param {!Object} JavaScript handle to check.
-   * @return {boolean} true if the given JavaScript handle is a valid handle.
-   */
-  function isValidHandle(handle) {
-    return handle.isValidMojoHandle;
-  };
-
-  /**
-   * Invalidates the given JavaScript handle.
-   *
-   * Subsequent {@code isValidHandle} calls will return true for this handle.
-   * @param {!Object} handle JavaScript handle to invalidate.
-   */
-  function invalidateHandle(handle) {
-    handle.isValidMojoHandle = false;
-  };
-
-  var exports = {};
-  exports.getJavaScriptHandle = getJavaScriptHandle;
-  exports.getNativeHandle = getNativeHandle;
-  exports.getNativeHandles = getNativeHandles;
-  exports.isValidHandle = isValidHandle;
-  exports.invalidateHandle = invalidateHandle;
-  return exports;
-});