[Sheriff] Disable flaky SafetyTipPageInfoBubbleViewBrowserTest tests

Disable the following flaky tests on Mac:
All/SafetyTipPageInfoBubbleViewBrowserTest.TimeOpenHistogram/1,
All/SafetyTipPageInfoBubbleViewBrowserTest.WarningDismissalCausesUkmRecordingForBlocklist/1,
All/SafetyTipPageInfoBubbleViewBrowserTest.SafetyTipShownHistogram/1, and
All/SafetyTipPageInfoBubbleViewBrowserTest.LeaveSiteStillWarnsAfter/1

Note: Unfortunately, there's no good way (that I know of) to disable a
single test case on a single platform with a single test instantiation,
so this CL disables all instantations of these test cases on Mac. This
seems better than disabling all test cases for the instantation.

TBR=jdeblasio@chromium.org
NOTRY=True

Bug: 1139955
Change-Id: I749d0ec37d227c7ec74c6fbb2128d76bf5efe18f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485134Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818498}

chrome/browser/ui/views/page_info/safety_tip_page_info_bubble_view_browsertest.cc

@@ -626,6 +626,12 @@ IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
 
 // If the user clicks 'leave site', the warning should re-appear when the user
 // re-visits the page.
+// Flaky on Mac: https://crbug.com/1139955
+#if defined(OS_MAC)
+#define MAYBE_LeaveSiteStillWarnsAfter DISABLED_LeaveSiteStillWarnsAfter
+#else
+#define MAYBE_LeaveSiteStillWarnsAfter LeaveSiteStillWarnsAfter
+#endif
 IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
                        LeaveSiteStillWarnsAfter) {
   auto kNavigatedUrl = GetURL("site1.com");
@@ -848,6 +854,12 @@ IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
 }
 
 // Tests that the SafetyTipShown histogram triggers correctly.
+// Flaky on Mac: https://crbug.com/1139955
+#if defined(OS_MAC)
+#define MAYBE_SafetyTipShownHistogram DISABLED_SafetyTipShownHistogram
+#else
+#define MAYBE_SafetyTipShownHistogram SafetyTipShownHistogram
+#endif
 IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
                        SafetyTipShownHistogram) {
   const char kHistogramName[] = "Security.SafetyTips.SafetyTipShown";
@@ -1013,6 +1025,12 @@ IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
 
 // Tests that the histograms recording how long the Safety Tip is open are
 // recorded properly.
+// Flaky on Mac: https://crbug.com/1139955
+#if defined(OS_MAC)
+#define MAYBE_TimeOpenHistogram DISABLED_TimeOpenHistogram
+#else
+#define MAYBE_TimeOpenHistogram TimeOpenHistogram
+#endif
 IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
                        TimeOpenHistogram) {
   if (!IsSuspiciousSiteWarningEnabled()) {
@@ -1257,6 +1275,14 @@ IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
 
 // Tests that UKM data is only recorded after the safety tip warning is
 // dismissed or accepted, for the blocklist heuristic.
+// Flaky on Mac: https://crbug.com/1139955
+#if defined(OS_MAC)
+#define MAYBE_WarningDismissalCausesUkmRecordingForBlocklist \
+  DISABLED_WarningDismissalCausesUkmRecordingForBlocklist
+#else
+#define MAYBE_WarningDismissalCausesUkmRecordingForBlocklist \
+  WarningDismissalCausesUkmRecordingForBlocklist
+#endif
 IN_PROC_BROWSER_TEST_P(SafetyTipPageInfoBubbleViewBrowserTest,
                        WarningDismissalCausesUkmRecordingForBlocklist) {
   // Only test when any UI is actually enabled.