Disable testDialogDismissedIfCameraBecomesAvailable on iOS12.2+

due to crashes.

Bug: 1019211
Change-Id: Idc7d059fcadd0dfa589130f8cde1ac275a1c0088
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888537
Auto-Submit: Lindsay Pasricha <lindsayw@chromium.org>
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710743}

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

@@ -641,7 +641,13 @@ 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 (!base::ios::IsRunningOnIOS13OrLater()) {
+    EARL_GREY_TEST_SKIPPED(@"Test fails iOS 12.2");
+  }
+#endif  // TARGET_IPHONE_SIMULATOR
   id cameraControllerMock =
       [QRScannerAppInterface cameraControllerMockWithAuthorizationStatus:
                                  AVAuthorizationStatusAuthorized];