[iOS] Disable failing EG2 tests in ui suite.

Disabled 2 tests failing in downstream builder.

Bug: 1106996, 1106997
Change-Id: I96f0d9197e4242587b667b271cc9d51ba50c0b37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2305123Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790065}

ios/chrome/browser/context_menu/context_menu_egtest.mm

@@ -183,6 +183,10 @@ void TapOnContextMenuButton(id<GREYMatcher> context_menu_item_button) {
 
 // Tests "Open in New Tab" on context menu.
 - (void)testContextMenuOpenInNewTab {
+  // TODO(crbug.com/1107513): Test fails in some iPads.
+  if ([ChromeEarlGrey isIPadIdiom]) {
+    EARL_GREY_TEST_SKIPPED(@"Test disabled on iPad.");
+  }
   const GURL initialURL = self.testServer->GetURL(kInitialPageUrl);
   [ChromeEarlGrey loadURL:initialURL];
   [ChromeEarlGrey

ios/chrome/browser/ui/fullscreen/fullscreen_egtest.mm

@@ -78,12 +78,8 @@ void AssertURLIs(const GURL& expectedURL) {
 // Verifies that the content offset of the web view is set up at the correct
 // initial value when initially displaying a PDF.
 // TODO(crbug.com/947536): Fails on iOS 12 devices.
-#if !TARGET_IPHONE_SIMULATOR
-#define MAYBE_testLongPDFInitialState DISABLED_testLongPDFInitialState
-#else
-#define MAYBE_testLongPDFInitialState testLongPDFInitialState
-#endif
-- (void)MAYBE_testLongPDFInitialState {
+// TODO(crbug.com/1106997): Test fails in simulator builders.
+- (void)DISABLED_testLongPDFInitialState {
   web::test::SetUpFileBasedHttpServer();
   GURL URL = web::test::HttpServer::MakeUrl(
       "http://ios/testing/data/http_server_files/two_pages.pdf");