[iOS] Disable testDialog* QRScanner tests on EG2 and iOS 12

Bug: 1019211
Change-Id: I2df1ed99e225bbd6b7e480388828632b7d6ef13d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1890412
Commit-Queue: Robbie Gibson <rkgibson@google.com>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710773}

ios/chrome/browser/ui/qr_scanner/qr_scanner_view_controller_egtest.mm

@@ -569,7 +569,13 @@ void TapKeyboardReturnKeyInOmniboxWithText(std::string text) {
 
 // Tests that a UIAlertController is presented by the QRScannerViewController if
 // the camera state changes after the QRScannerViewController is presented.
+// TODO(crbug.com/1019211): Re-enable test on iOS12.
 - (void)testDialogIsDisplayedIfCameraStateChanges {
+#if defined(CHROME_EARL_GREY_2)
+  if (!base::ios::IsRunningOnIOS13OrLater()) {
+    EARL_GREY_TEST_SKIPPED(@"Test fails on iOS 12 under EG2.");
+  }
+#endif
   id cameraControllerMock =
       [QRScannerAppInterface cameraControllerMockWithAuthorizationStatus:
                                  AVAuthorizationStatusAuthorized];
@@ -602,7 +608,13 @@ void TapKeyboardReturnKeyInOmniboxWithText(std::string text) {
 }
 
 // Tests that a new dialog replaces an old dialog if the camera state changes.
+// TODO(crbug.com/1019211): Re-enable test on iOS12.
 - (void)testDialogIsReplacedIfCameraStateChanges {
+#if defined(CHROME_EARL_GREY_2)
+  if (!base::ios::IsRunningOnIOS13OrLater()) {
+    EARL_GREY_TEST_SKIPPED(@"Test fails on iOS 12 under EG2.");
+  }
+#endif
   id cameraControllerMock =
       [QRScannerAppInterface cameraControllerMockWithAuthorizationStatus:
                                  AVAuthorizationStatusAuthorized];
@@ -643,11 +655,11 @@ void TapKeyboardReturnKeyInOmniboxWithText(std::string text) {
 // Tests that an error dialog is dismissed if the camera becomes available.
 // TODO(crbug.com/1019211): Re-enable test on iOS12.
 - (void)testDialogDismissedIfCameraBecomesAvailable {
-#if TARGET_IPHONE_SIMULATOR
+#if defined(CHROME_EARL_GREY_2)
   if (!base::ios::IsRunningOnIOS13OrLater()) {
     EARL_GREY_TEST_SKIPPED(@"Test fails iOS 12.2");
   }
-#endif  // TARGET_IPHONE_SIMULATOR
+#endif  // defined(CHROME_EARL_GREY_2)
   id cameraControllerMock =
       [QRScannerAppInterface cameraControllerMockWithAuthorizationStatus:
                                  AVAuthorizationStatusAuthorized];