Disable PrerenderTestCase testTapPrerenderSuggestions for iOS 13.4

TBR=eugenebut@chromium.org

Bug: 1076573
Change-Id: If93a424cd715445c30a1534bce22e236624ec8d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2173433Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#763980}

ios/chrome/browser/prerender/prerender_egtest.mm

@@ -6,6 +6,7 @@
 #import "ios/testing/earl_grey/earl_grey_test.h"
 
 #include "base/bind.h"
+#include "base/ios/ios_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
@@ -55,6 +56,11 @@ std::unique_ptr<net::test_server::HttpResponse> StandardResponse(
 
 // Test that tapping the prerendered suggestions opens it.
 - (void)testTapPrerenderSuggestions {
+  // TODO(crbug.com/1076573): Test is failing when running on iOS 13.4.
+  if (base::ios::IsRunningOnOrLater(13, 4, 0)) {
+    EARL_GREY_TEST_DISABLED(@"Test disabled on iOS 13.4 and later.");
+  }
+
   // TODO(crbug.com/793306): Re-enable the test on iPad once the alternate
   // letters problem is fixed.
   if ([ChromeEarlGrey isIPadIdiom]) {