Add an explicit full-screen button.

remoting/webapp/fullscreen_v1.js

 // 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.
 
 /**
  * @fileoverview
  * Full-screen implementation for apps v1, using webkitRequestFullscreen.
  */
 
 'use strict';
@@ skipping 57 matching lines @@
 };
 
 remoting.FullscreenAppsV1.prototype.addListener = function(callback) {
   this.eventSource_.addEventListener(this.kEventName_, callback);
 };
 
 remoting.FullscreenAppsV1.prototype.removeListener = function(callback) {
   this.eventSource_.removeEventListener(this.kEventName_, callback);
 };
 
-remoting.FullscreenAppsV1.prototype.syncWithMaximize = function(sync) {
-};
-
 /**
  * @private
  */
 remoting.FullscreenAppsV1.prototype.onFullscreenChanged_ = function() {
   this.eventSource_.raiseEvent(this.kEventName_, this.isActive());
 };