Add support for transparent background API

chrome/browser/extensions/api/app_window/app_window_apitest.cc

Index: chrome/browser/extensions/api/app_window/app_window_apitest.cc
diff --git a/chrome/browser/extensions/api/app_window/app_window_apitest.cc b/chrome/browser/extensions/api/app_window/app_window_apitest.cc
index 9f0f546a0e00a4a035a07c608ffec78339831feb..64a0f3516809c1e1856df4a58d40182197c18076 100644
--- a/chrome/browser/extensions/api/app_window/app_window_apitest.cc
+++ b/chrome/browser/extensions/api/app_window/app_window_apitest.cc
@@ -110,4 +110,17 @@ IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, WindowsApiGet) {
       << message_;
 }
 
+IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest,
+                       WindowsApiAlphaEnabledHasPermissions) {
+#if defined(USE_AURA)
+  EXPECT_TRUE(RunPlatformAppTest(
+      "platform_apps/windows_api_alpha_enabled/has_permissions_aura"))
+      << message_;
+#else
+  EXPECT_TRUE(RunPlatformAppTest(
+      "platform_apps/windows_api_alpha_enabled/has_permissions_no_aura"))
+      << message_;
+#endif
+}
+
 }  // namespace extensions