Sheriff: Disable DiceSigninUiUtilTest.EnableSyncForNewAccountWithNoTabWithExisting

The test is flaky on several bots. See the issue for details.

Bug: 1014790
Change-Id: Ib438e3fabf825b2ebafc5d59a1de6248a260c5cd
Tbr: bsazonov@chromium.org
Notry: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1862879Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706263}

chrome/browser/signin/signin_ui_util_unittest.cc

@@ -411,7 +411,9 @@ TEST_F(DiceSigninUiUtilTest, EnableSyncForNewAccountWithNoTab) {
       active_contents->GetVisibleURL());
 }
 
-TEST_F(DiceSigninUiUtilTest, EnableSyncForNewAccountWithNoTabWithExisting) {
+// TODO(https://crbug.com/1014790): This is flaky on several bots.
+TEST_F(DiceSigninUiUtilTest,
+       DISABLED_EnableSyncForNewAccountWithNoTabWithExisting) {
   base::HistogramTester histogram_tester;
   base::UserActionTester user_action_tester;