Lindsay, could you take a look on this? Or assign more appropriate person?

In the regression range, only your CL touches on iOS tests.
https://chromium.googlesource.com/chromium/src/+/b88711d9d386bbf910b2a815640ada0e6dad35b3

This is likely related to Xcode 8 iOS10.3 random timeouts

Hey Lindsay, this has failed again with a timeout. Could you PTAL?

The most recent failure was on Phone 6s iOS 11.2, so its not a 10.3 issue as we thought.

services_unittests are passing on iPhone 6s. 
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/ios-simulator/34734

(iPad Air 2 iOS 10.3):
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/39111
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/39158
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/39089

(iPhone 6s iOS 11.2):
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/39151
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/39148
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/ios-simulator/39113

Lindsay, can you take a look at the try flakes?

This has been flaky on ios-simulator recently. Examples:

https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/ios-simulator/35867
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/ios-simulator/35871
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/ios-simulator/35876

In all cases, it looks like the test hangs in the middle.

ping - still flaking, e.g. https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/ios-simulator/36281

I think this might have been at the beginning of some infra issues that came up over the past 2 days. Since the queue has cleared, these are solid green.