ios-simulator tasks sometimes fail due to test_suite or device issues. Unclear, see Issue 919164 for more details.

There currently does not exist a retry layer [except for CQ-layer build retries]. We should try to make the cheapest possible retries, probably by redispatching the same task. We'll need to modify the recipe to support this:
https://cs.chromium.org/chromium/build/scripts/slave/recipes/ios/try.py?type=cs&q=file:ios.*py$+test_swarming&sq=package:chromium&g=0&l=23

I don't know why this uses a different recipe+recipe_module than chromium_tests.