Disable flaky OmniboxPopupContentsViewTest.EmitAccessibilityEventsOnButtonFocusHint on Mac

Bug: 1146627
Change-Id: If63388da004cdd40d7cd3b777886893e9bf1facf
NoTry: True
Tbr: jdonnelly@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523760Reviewed-by: Xiaocheng Hu <xiaochengh@chromium.org>
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825116}

chrome/browser/ui/views/omnibox/omnibox_popup_contents_view_browsertest.cc

@@ -469,6 +469,12 @@ IN_PROC_BROWSER_TEST_F(OmniboxPopupContentsViewTest,
             selected_result_view->GetViewAccessibility().GetUniqueId().Get());
 }
 
+// Flaky on Mac: https://crbug.com/1146627.
+#if defined(OS_MAC)
+#define MAYBE_EmitAccessibilityEventsOnButtonFocusHint DISABLED_EmitAccessibilityEventsOnButtonFocusHint
+#else
+#define MAYBE_EmitAccessibilityEventsOnButtonFocusHint EmitAccessibilityEventsOnButtonFocusHint
+#endif
 IN_PROC_BROWSER_TEST_F(OmniboxPopupContentsViewTest,
                        EmitAccessibilityEventsOnButtonFocusHint) {
   TestAXEventObserver observer;