Mojo JS bindings: make sure that console.log() could be used in the bindings.

ios/web/webui/resources/console.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 "console"
+//
+// This module provides basic logging support.
+
+define("console", [
+  "ios/mojo/public/js/sync_message_channel",
+], function(syncMessageChannel) {
+  /**
+   * Synchronously logs a message to mojo backend.
+   * @param {string} message to log.
+   */
+  function log(message) {
+    console.log(message);
+    /*syncMessageChannel.sendMessage({
+      name: "console.log",
+      args: {
+        message: message
+      }
+    });*/
+  }
+
+  var exports = {};
+  exports.log = log;
+  return exports;
+});