Disable flaky WebViewFocusInteractiveTest.FocusAndVisibility test on MacOS

chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc

Index: chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
diff --git a/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc b/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
index 4ea8120e240a79b88ac45613a3cb0a7cfae6d38b..608fd6f008c1e22ff983efb4e2843a8e276535f7 100644
--- a/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
+++ b/chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc
@@ -1325,7 +1325,14 @@ IN_PROC_BROWSER_TEST_P(WebViewInteractiveTest, TextSelection) {
 }
 #endif
 
-IN_PROC_BROWSER_TEST_F(WebViewFocusInteractiveTest, FocusAndVisibility) {
+// Flaky on MacOS builders. https://crbug.com/670008
+#if defined(OS_MACOSX)
+#define MAYBE_FocusAndVisibility DISABLED_FocusAndVisibility
+#else
+#define MAYBE_FocusAndVisibility FocusAndVisibility
+#endif
+
+IN_PROC_BROWSER_TEST_F(WebViewFocusInteractiveTest, MAYBE_FocusAndVisibility) {
   ASSERT_TRUE(StartEmbeddedTestServer());
   LoadAndLaunchPlatformApp("web_view/focus_visibility",
                            "WebViewInteractiveTest.LOADED");