Revert of Disable crashy KioskTest.PRE_LaunchAppNetworkDown.

chrome/browser/chromeos/login/kiosk_browsertest.cc

Index: chrome/browser/chromeos/login/kiosk_browsertest.cc
diff --git a/chrome/browser/chromeos/login/kiosk_browsertest.cc b/chrome/browser/chromeos/login/kiosk_browsertest.cc
index 37a286c4d019d6c8213c1361f3a0d7c0291d39b5..5f960f1a7096e3286ef5e4082fa739d3ec5b6ccd 100644
--- a/chrome/browser/chromeos/login/kiosk_browsertest.cc
+++ b/chrome/browser/chromeos/login/kiosk_browsertest.cc
@@ -940,14 +940,12 @@
       SigninManagerFactory::GetForProfile(app_profile)->IsAuthenticated());
 }
 
-// Disabled due to crashes; https://crbug.com/634807.
-IN_PROC_BROWSER_TEST_F(KioskTest, DISABLED_PRE_LaunchAppNetworkDown) {
+IN_PROC_BROWSER_TEST_F(KioskTest, PRE_LaunchAppNetworkDown) {
   // Tests the network down case for the initial app download and launch.
   RunAppLaunchNetworkDownTest();
 }
 
-// Disabled due to crashes; https://crbug.com/634807.
-IN_PROC_BROWSER_TEST_F(KioskTest, DISABLED_LaunchAppNetworkDown) {
+IN_PROC_BROWSER_TEST_F(KioskTest, LaunchAppNetworkDown) {
   // Tests the network down case for launching an existing app that is
   // installed in PRE_LaunchAppNetworkDown.
   RunAppLaunchNetworkDownTest();