Add support for transparent background API

chrome/test/data/extensions/platform_apps/windows_api_alpha_enabled/has_permissions_no_aura/background.js

Index: chrome/test/data/extensions/platform_apps/windows_api_alpha_enabled/has_permissions_no_aura/background.js
diff --git a/chrome/test/data/extensions/platform_apps/windows_api_alpha_enabled/has_permissions_no_aura/background.js b/chrome/test/data/extensions/platform_apps/windows_api_alpha_enabled/has_permissions_no_aura/background.js
new file mode 100644
index 0000000000000000000000000000000000000000..84aab4633d3c6468fef68d7d554b1f8b22d02918
--- /dev/null
+++ b/chrome/test/data/extensions/platform_apps/windows_api_alpha_enabled/has_permissions_no_aura/background.js
@@ -0,0 +1,33 @@
+// 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.
+
+var error = 'Alpha-blended windows are not supported on this platform.';
+
+function testAlphaEnabled(testId, setValue) {
+  var createOptions = { id: testId };
+  createOptions.alphaEnabled = setValue;
+
+  chrome.app.window.create('index.html',
+                           createOptions,
+                           chrome.test.callbackFail(error));
+}
+
+// All these tests are run with app.window.alpha permission
+// set and on a system without Aura.
+
+chrome.app.runtime.onLaunched.addListener(function() {
+  chrome.test.runTests([
+
+    // Window is created with alphaEnabled set to true.
+    function testAlphaEnabledPermNoAuraInitTrue() {
+      testAlphaEnabled('testAlphaEnabledPermNoAuraInitTrue', true);
+    },
+
+    // Window is created with alphaEnabled set to false.
+    function testAlphaEnabledPermNoAuraInitFalse() {
+      testAlphaEnabled('testAlphaEnabledPermNoAuraInitFalse', false);
+    }
+
+  ]);
+});