Disable ReplaceEphemeralAppWithInstalledApp on Windows due to flakiness.

chrome/browser/apps/ephemeral_app_browsertest.cc

 // 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.
 
 #include "chrome/browser/apps/ephemeral_app_browsertest.h"
 
 #include <vector>
 
 #include "apps/app_restore_service.h"
 #include "apps/saved_files_service.h"
@@ skipping 848 matching lines @@
   CloseAppWaitForUnload(app->id());
   VerifyInactiveEphemeralApp(app->id());
 
   PromoteEphemeralAppFromSyncAndVerify(app, false, ExtensionRegistry::DISABLED);
 }
 
 // In most cases, ExtensionService::PromoteEphemeralApp() will be called to
 // permanently install an ephemeral app. However, there may be cases where an
 // install occurs through the usual route of installing from the Web Store (due
 // to race conditions). Ensure that the app is still installed correctly.
+#if defined(OS_WIN)
+// Disabled on Windows due to failures. See crbug.com/401028
+#define MAYBE_ReplaceEphemeralAppWithInstalledApp \
+    DISABLED_ReplaceEphemeralAppWithInstalledApp
+#else
+#define MAYBE_ReplaceEphemeralAppWithInstalledApp \
+    ReplaceEphemeralAppWithInstalledApp
+#endif
 IN_PROC_BROWSER_TEST_F(EphemeralAppBrowserTest,
-                       ReplaceEphemeralAppWithInstalledApp) {
+                       MAYBE_ReplaceEphemeralAppWithInstalledApp) {
   InitSyncService();
 
   const Extension* app = InstallAndLaunchEphemeralApp(kNotificationsTestApp);
   ASSERT_TRUE(app);
   CloseAppWaitForUnload(app->id());
   std::string app_id = app->id();
   app = NULL;
 
   InstallObserver installed_observer(profile());
   ReplaceEphemeralApp(app_id, kNotificationsTestApp, 1);
@@ skipping 78 matching lines @@
 
   // Ensure that when the app is promoted to an installed app, the bit in the
   // creation flags is cleared.
   PromoteEphemeralApp(app);
   EXPECT_FALSE(extensions::util::IsEphemeralApp(app->id(), profile()));
 
   int creation_flags =
       ExtensionPrefs::Get(profile())->GetCreationFlags(app->id());
   EXPECT_EQ(0, creation_flags & Extension::IS_EPHEMERAL);
 }