Fix Chromoting client startup warnings.

remoting/webapp/client_session.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview
  * Class handling creation and teardown of a remoting client session.
  *
  * The ClientSession class controls lifetime of the client plugin
  * object and provides the plugin with the functionality it needs to
@@ skipping 700 matching lines @@
  * @param {boolean} apply True to apply remappings, false to cancel them.
  */
 remoting.ClientSession.prototype.applyRemapKeys_ = function(apply) {
   // By default, under ChromeOS, remap the right Control key to the right
   // Win / Cmd key.
   var remapKeys = this.remapKeys_;
   if (remapKeys == '' && remoting.runningOnChromeOS()) {
     remapKeys = '0x0700e4>0x0700e7';
   }
 
+  if (remapKeys == '') {
+    return;
+  }
+
   var remappings = remapKeys.split(',');
   for (var i = 0; i < remappings.length; ++i) {
     var keyCodes = remappings[i].split('>');
     if (keyCodes.length != 2) {
       console.log('bad remapKey: ' + remappings[i]);
       continue;
     }
     var fromKey = parseInt(keyCodes[0], 0);
     var toKey = parseInt(keyCodes[1], 0);
     if (!fromKey || !toKey) {
@@ skipping 772 matching lines @@
  * @return {{width: number, height: number}} The height of the window's client
  *     area. This differs between apps v1 and apps v2 due to the custom window
  *     borders used by the latter.
  * @private
  */
 remoting.ClientSession.prototype.getClientArea_ = function() {
   return remoting.windowFrame ?
       remoting.windowFrame.getClientArea() :
       { 'width': window.innerWidth, 'height': window.innerHeight };
 }