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

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

Index: chrome/test/data/extensions/platform_apps/active_test/test.js
diff --git a/chrome/test/data/extensions/platform_apps/active_test/test.js b/chrome/test/data/extensions/platform_apps/active_test/test.js
index 984c49748ec695674bacb9db61f2fde0d47daea7..92cd56e6bf6688efc31afbdbc6d225306679632c 100644
--- a/chrome/test/data/extensions/platform_apps/active_test/test.js
+++ b/chrome/test/data/extensions/platform_apps/active_test/test.js
@@ -33,9 +33,16 @@ function processNextCommand() {
 
     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);
     });
   });
 }