Disabling flaky interactive_ui_test "CancelsForOwnDrag" on Mac.

TBR: ellyjones@chromium.org
Bug: 863296
Change-Id: Idf257bcc95b35aceaaa2288f50d6f7cc9cf72f12
Reviewed-on: https://chromium-review.googlesource.com/1136719Reviewed-by: Kim Paulhamus <kpaulhamus@chromium.org>
Commit-Queue: Kim Paulhamus <kpaulhamus@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574970}

chrome/browser/ui/views/menu_view_drag_and_drop_test.cc

@@ -517,5 +517,10 @@ void MenuViewDragAndDropForDropCancel::DoTestWithMenuOpen() {
 
 // Test that if a menu is opened for a drop handled entirely by menu code, the
 // menu will try to close if it does not receive any drag updates.
-// If this flakes, disable and log details in http://crbug.com/523255.
-VIEW_TEST(MenuViewDragAndDropForDropCancel, MenuViewCancelsForOwnDrag)
+// Disabled for being flaky. Tracked in http://crbug.com/863296.
+#if defined(OS_MACOSX)
+#define MAYBE_MenuViewCancelsForOwnDrag DISABLED_MenuViewCancelsForOwnDrag
+#else
+#define MAYBE_MenuViewCancelsForOwnDrag MenuViewCancelsForOwnDrag
+#endif
+VIEW_TEST(MenuViewDragAndDropForDropCancel, MAYBE_MenuViewCancelsForOwnDrag)