Disable crashy KioskTest.PRE_LaunchAppNetworkDown.

chrome/browser/chromeos/login/kiosk_browsertest.cc

 // Copyright (c) 2013 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 <memory>
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_controller_observer.h"
 #include "ash/shell.h"
@@ skipping 922 matching lines @@
   StartAppLaunchFromLoginScreen(SimulateNetworkOnlineClosure());
   WaitForAppLaunchSuccess();
   EXPECT_EQ(extensions::Manifest::EXTERNAL_PREF, GetInstalledAppLocation());
 
   Profile* app_profile = ProfileManager::GetPrimaryUserProfile();
   ASSERT_TRUE(app_profile);
   EXPECT_FALSE(
       SigninManagerFactory::GetForProfile(app_profile)->IsAuthenticated());
 }
 
-IN_PROC_BROWSER_TEST_F(KioskTest, PRE_LaunchAppNetworkDown) {
+// Disabled due to crashes; https://crbug.com/634807.
+IN_PROC_BROWSER_TEST_F(KioskTest, DISABLED_PRE_LaunchAppNetworkDown) {
   // Tests the network down case for the initial app download and launch.
   RunAppLaunchNetworkDownTest();
 }
 
-IN_PROC_BROWSER_TEST_F(KioskTest, LaunchAppNetworkDown) {
+// Disabled due to crashes; https://crbug.com/634807.
+IN_PROC_BROWSER_TEST_F(KioskTest, DISABLED_LaunchAppNetworkDown) {
   // Tests the network down case for launching an existing app that is
   // installed in PRE_LaunchAppNetworkDown.
   RunAppLaunchNetworkDownTest();
 }
 
 IN_PROC_BROWSER_TEST_F(KioskTest, LaunchAppWithNetworkConfigAccelerator) {
   ScopedCanConfigureNetwork can_configure_network(true, false);
 
   // Block app loading until the network screen is shown.
   std::unique_ptr<base::AutoLock> lock = LockFileThread();
@@ skipping 1443 matching lines @@
   content::WindowedNotificationObserver(
       chrome::NOTIFICATION_KIOSK_AUTOLAUNCH_WARNING_VISIBLE,
       content::NotificationService::AllSources()).Wait();
 
   // Wait for the wallpaper to load.
   WaitForWallpaper();
   EXPECT_TRUE(wallpaper_loaded());
 }
 
 }  // namespace chromeos