Disable LoginCursorTest.CursorHidden

Sudden spike in flakes. No obvious culprit. First failed build is here.
https://ci.chromium.org/p/chromium/builders/ci/linux-chromeos-dbg/17265

Bug:1056429
Change-Id: I209f8e971a08ccce0b6b64ea8676db2789701efd

TBR=antrim@chromium.org

Change-Id: I209f8e971a08ccce0b6b64ea8676db2789701efd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2076549Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
Commit-Queue: Chrome Cunningham <chcunningham@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744891}

chrome/browser/chromeos/login/login_browsertest.cc

@@ -145,7 +145,8 @@ IN_PROC_BROWSER_TEST_F(LoginGuestTest, GuestIsOTR) {
 }
 
 // Verifies the cursor is hidden at startup on login screen.
-IN_PROC_BROWSER_TEST_F(LoginCursorTest, CursorHidden) {
+// DISABLED for flakiness. http://crbug.com/1056429
+IN_PROC_BROWSER_TEST_F(LoginCursorTest, DISABLED_CursorHidden) {
   // Login screen needs to be shown explicitly when running test.
   ShowLoginWizard(OobeScreen::SCREEN_SPECIAL_LOGIN);