Check isActive in onRestore to work-around crbug.com/394819.

remoting/webapp/fullscreen_v2.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 v2, using chrome.AppWindow.
  */
 
 'use strict';
@@ skipping 76 matching lines @@
 remoting.FullscreenAppsV2.prototype.addListener = function(callback) {
   this.eventSource_.addEventListener(this.kEventName_, callback);
 };
 
 remoting.FullscreenAppsV2.prototype.removeListener = function(callback) {
   this.eventSource_.removeEventListener(this.kEventName_, callback);
 };
 
 remoting.FullscreenAppsV2.prototype.syncWithMaximize = function(sync) {
   if (sync && chrome.app.window.current().isMaximized()) {
+    chrome.app.window.current().restore();
     this.activate(true);
   }
   this.hookingWindowEvents_ = sync;
 };
 
 remoting.FullscreenAppsV2.prototype.onFullscreened_ = function() {
   this.notifyCallbacksOnRestore_ = true;
   this.eventSource_.raiseEvent(this.kEventName_, true);
   document.body.classList.add('fullscreen');
 };
 
 remoting.FullscreenAppsV2.prototype.onMaximized_ = function() {
   if (this.hookingWindowEvents_) {
+    chrome.app.window.current().restore();
     this.activate(true);
   }
 };
 
 remoting.FullscreenAppsV2.prototype.onRestored_ = function() {
+  // TODO(jamiewalch): ChromeOS generates a spurious onRestore event if
+  // fullscreen() is called from an onMaximized handler (crbug.com/394819),
+  // so ignore the callback if the window is still full-screen.
+  if (this.isActive()) {
+    return;
+  }
+
   document.body.classList.remove('fullscreen');
   if (this.hookingWindowEvents_) {
     this.activate(false);
   }
   if (this.notifyCallbacksOnRestore_) {
     this.notifyCallbacksOnRestore_ = false;
     this.eventSource_.raiseEvent(this.kEventName_, false);
   }
 };