Disables testShowJavaScriptAfterNewTabAnimation on tablets.

ios/chrome/browser/ui/dialogs/javascript_dialog_egtest.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <EarlGrey/EarlGrey.h>
 #import <UIKit/UIKit.h>
 #import <XCTest/XCTest.h>
 
 #import "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 537 matching lines @@
 
 // Tests that an alert is presented after a new tab animation is finished.
 - (void)testShowJavaScriptAfterNewTabAnimation {
 // TODO(crbug.com/663026): Reenable the test for devices.
 #if !TARGET_IPHONE_SIMULATOR
   EARL_GREY_TEST_DISABLED(@"Disabled for devices because existing system "
                           @"alerts would prevent app alerts to present "
                           @"correctly.");
 #endif
 
+  // TODO(crbug.com/711291): reenable this on tablets.
+  if (IsIPadIdiom()) {
+    EARL_GREY_TEST_DISABLED(@"Disabled for iPad.");
+  }
+
   // Load the test page with a link to kOnLoadAlertURL and long tap on the link.
   [self loadPageWithLink];
   id<GREYMatcher> webViewMatcher =
       chrome_test_util::WebViewContainingText(std::string(kPageWithLinkText));
   [[EarlGrey selectElementWithMatcher:webViewMatcher]
       performAction:chrome_test_util::LongPressElementForContextMenu(
                         kLinkID, true /* menu should appear */)];
 
   // Tap on the "Open In New Tab" button.
   id<GREYMatcher> newTabMatcher = testing::ContextMenuItemWithText(
@@ skipping 10 matching lines @@
   GURL onloadURL = HttpServer::MakeUrl(kOnLoadAlertURL);
   std::string title = base::UTF16ToUTF8(web::GetDisplayTitleForUrl(onloadURL));
   [[EarlGrey selectElementWithMatcher:chrome_test_util::OmniboxText(title)]
       assertWithMatcher:grey_notNil()];
 
   // Close the alert.
   TapOK();
 }
 
 @end