Sheriff: Disable FirstRunTestCase/testToggleMetricsOn

Bug: 1109117
Change-Id: Iaa980b203de782cdfec56ad89e01a2c86fadd1f0
Tbr: marq@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2320130Reviewed-by: Adithya Srinivasan <adithyas@chromium.org>
Commit-Queue: Adithya Srinivasan <adithyas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791827}

ios/chrome/browser/ui/first_run/first_run_egtest.mm

@@ -81,7 +81,8 @@ id<GREYMatcher> SkipSigninButton() {
 }
 
 // Toggle the UMA checkbox.
-- (void)testToggleMetricsOn {
+// TODO(crbug.com/1109117): Test is flaky.
+- (void)DISABLED_testToggleMetricsOn {
   [FirstRunAppInterface showFirstRunUI];
 
   id<GREYMatcher> metrics =