Disable DumpAccessibilityTreeTest.AccessibilityModalDialogInIframeClosed

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

Index: content/browser/accessibility/dump_accessibility_tree_browsertest.cc
diff --git a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
index 0c66be2a2612db1bba0281d389f914db7822900f..6501356a1a35900ecf3b74f71aa086a254f95958 100644
--- a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
@@ -1146,16 +1146,9 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
   RunHtmlTest(FILE_PATH_LITERAL("modal-dialog-opened.html"));
 }
 
-// Flaky on Windows and Mac: crbug.com/593846
-#if defined(OS_WIN) || defined(OS_MACOSX)
-#define MAYBE_AccessibilityModalDialogInIframeClosed \
-    DISABLED_AccessibilityModalDialogInIframeClosed
-#else
-#define MAYBE_AccessibilityModalDialogInIframeClosed \
-    AccessibilityModalDialogInIframeClosed
-#endif
+// Flaky: crbug.com/593846, crbug.com/596514
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
-                       MAYBE_AccessibilityModalDialogInIframeClosed) {
+                       DISABLED_AccessibilityModalDialogInIframeClosed) {
   RunHtmlTest(FILE_PATH_LITERAL("modal-dialog-in-iframe-closed.html"));
 }