Add AppWindow.setVisibleOnAllWorkspaces.

chrome/test/data/extensions/platform_apps/window_api/test.js

 // Copyright 2013 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.
 
 var callbackPass = chrome.test.callbackPass;
 var callbackFail = chrome.test.callbackFail;
 var defaultFuzzFactor = 1;
 
 function assertFuzzyEq(expected, actual, fuzzFactor, message) {
   if (!message) {
@@ skipping 1334 matching lines @@
       chrome.app.window.create('test.html', {
         frame: {
           color: 'DontWorryBeHappy'
         }
       },
       callbackFail('The color specification could not be parsed.'));
     }
   ]);
 }
 
+function testVisibleOnAllWorkspaces() {
+  chrome.test.runTests([
+    function setAndUnsetVisibleOnAllWorkspaces() {
+      chrome.app.window.create('test.html', callbackPass(function(win) {
+        win.setVisibleOnAllWorkspaces(true);
+        win.setVisibleOnAllWorkspaces(false);
+        chrome.test.sendMessage(
+            'WaitForRoundTrip', callbackPass(function(reply) {}));
+      }));
+    },
+  ]);
+}
+
 chrome.app.runtime.onLaunched.addListener(function() {
   chrome.test.sendMessage('Launched', function(reply) {
     window[reply]();
   });
 });