[iOS] Disable flaky Omnibox tests on iPad Simulator

Bug: 1128463
Change-Id: I32f05328e590ad7e8772cec8119e6d253d456853
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2412448
Auto-Submit: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807473}

ios/chrome/browser/ui/omnibox/popup/omnibox_popup_egtest.mm

@@ -147,6 +147,13 @@ std::unique_ptr<net::test_server::HttpResponse> StandardResponse(
 
 // Tests that the switch to open tab button isn't displayed for the current tab.
 - (void)testNotSwitchButtonOnCurrentTab {
+// TODO(crbug.com/1128463): Test is flaky on iPad simulator.
+#if TARGET_IPHONE_SIMULATOR
+  if ([ChromeEarlGrey isIPadIdiom]) {
+    EARL_GREY_TEST_SKIPPED(@"This test is flaky on iPad simulators.");
+  }
+#endif
+
 // TODO(crbug.com/1067817): Test won't pass on iPad devices.
 #if !TARGET_IPHONE_SIMULATOR
   if ([ChromeEarlGrey isIPadIdiom]) {
@@ -270,12 +277,20 @@ std::unique_ptr<net::test_server::HttpResponse> StandardResponse(
 }
 
 - (void)testDontCloseNTPWhenSwitchingWithForwardHistory {
+// TODO(crbug.com/1128463): Test is flaky on iPad simulator.
+#if TARGET_IPHONE_SIMULATOR
+  if ([ChromeEarlGrey isIPadIdiom]) {
+    EARL_GREY_TEST_SKIPPED(@"This test is flaky on iPad simulators.");
+  }
+#endif
+
 // TODO(crbug.com/1067817): Test won't pass on iPad devices.
 #if !TARGET_IPHONE_SIMULATOR
   if ([ChromeEarlGrey isIPadIdiom]) {
     EARL_GREY_TEST_SKIPPED(@"This test doesn't pass on iPad device.");
   }
 #endif
+
   // Open the first page.
   GURL URL1 = self.testServer->GetURL(kPage1URL);
   [ChromeEarlGrey loadURL:URL1];