Marked testContextMenuOpenInNewTabFromTallPage flaky on device.

ios/chrome/browser/context_menu/context_menu_egtest.mm

Index: ios/chrome/browser/context_menu/context_menu_egtest.mm
diff --git a/ios/chrome/browser/context_menu/context_menu_egtest.mm b/ios/chrome/browser/context_menu/context_menu_egtest.mm
index 21b5311a671bec36ca59f9ce040289597c19207f..65c652fda9189b8c9126a576507ee7c42cd32bf0 100644
--- a/ios/chrome/browser/context_menu/context_menu_egtest.mm
+++ b/ios/chrome/browser/context_menu/context_menu_egtest.mm
@@ -174,7 +174,15 @@ void SelectTabAtIndexInCurrentMode(NSUInteger index) {
 // Tests "Open in New Tab" on context menu  on a link that requires scrolling
 // on the page to verify that context menu can be properly triggered in the
 // current screen view.
-- (void)testContextMenuOpenInNewTabFromTallPage {
+// TODO(crbug.com/681130): Re-enable this test on device.
+#if TARGET_IPHONE_SIMULATOR
+#define MAYBE_testContextMenuOpenInNewTabFromTallPage \
+  testContextMenuOpenInNewTabFromTallPage
+#else
+#define MAYBE_testContextMenuOpenInNewTabFromTallPage \
+  FLAKY_testContextMenuOpenInNewTabFromTallPage
+#endif
+- (void)MAYBE_testContextMenuOpenInNewTabFromTallPage {
   // Set up test simple http server.
   std::map<GURL, std::string> responses;
   GURL initialURL =