Flip --enable-apps-show-on-first-paint flag.

chrome/test/data/extensions/platform_apps/active_test/test.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.
 
 // This test gets sent commands to execute, which it is sent by the
 // controlling C++ code. This code then checks that the apps' active state
 // is being tracked correctly.
 var windows = [];
 
 function windowClosed() {
@@ skipping 15 matching lines @@
     createOptions = {};
 
     if (response == 'createMinimized')
       createOptions.state = 'minimized';
 
     if (response == 'createHidden')
       createOptions.hidden = true;
 
     chrome.app.window.create('empty.html', createOptions,
         function(createdWindow) {
-      createdWindow.onClosed.addListener(windowClosed);
-      windows.push(createdWindow);
-      processNextCommand();
+      handleWindowReady = function() {
+        createdWindow.onClosed.addListener(windowClosed);
+        windows.push(createdWindow);
+        processNextCommand();
+      }
+
+      if (createOptions.hidden)
+        handleWindowReady();
+      else
+        createdWindow.onWindowFirstShown.addListener(handleWindowReady);
     });
   });
 }
 
 processNextCommand();