sheriff: Disable message_center_unittest on MacOS

This change disables the
MessagePopupCollectionTest.UpdateContentsCausePopupClose on MacOS due to
the MacOS 10.10 builder failing it.

Bug: 1047503

TBR=xidachen@chromium.org,dewittj@chromium.org,estade@chromium.org,peter@chromium.org,yoshiki@chromium.org,tengs@chromium.org

Change-Id: I58ea2274b0c00bb0fc176cd30dc6a34780a783b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2031856Reviewed-by: Ovidio de Jesús Ruiz-Henríquez <odejesush@chromium.org>
Commit-Queue: Ovidio de Jesús Ruiz-Henríquez <odejesush@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737105}

ui/message_center/views/message_popup_collection_unittest.cc

@@ -7,6 +7,7 @@
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "build/build_config.h"
 #include "ui/display/display.h"
 #include "ui/events/base_event_utils.h"
 #include "ui/gfx/animation/linear_animation.h"
@@ -428,7 +429,14 @@ TEST_F(MessagePopupCollectionTest, UpdateContents) {
   EXPECT_TRUE(GetPopup(id)->updated());
 }
 
-TEST_F(MessagePopupCollectionTest, UpdateContentsCausesPopupClose) {
+// Failiing on MacOS 10.10. https://crbug.com/1047503
+#if defined(OS_MACOSX)
+#define MAYBE_UpdateContentsCausesPopupClose \
+  DISABLED_UpdateContentsCausesPopupClose
+#else
+#define MAYBE_UpdateContentsCausesPopupClose UpdateContentsCausesPopupClose
+#endif
+TEST_F(MessagePopupCollectionTest, MAYBE_UpdateContentsCausesPopupClose) {
   std::string id = AddNotification();
   AnimateToEnd();
   RunPendingMessages();