ios_chrome_unittests (iPad Air 2 iOS 10.0) failing on chromium.mac/ios-simulator

Type: build-failure

Builders failed on: 
- ios-simulator: 
  https://build.chromium.org/p/chromium.mac/builders/ios-simulator


Stack trace is not helpful, but I've seen this test fail a number of times over the past few days, both on the public and internal waterfalls.

[ RUN      ] BrowserViewWranglerTest.TestInitNilObserver
[5690:1027:0105/124019.951436:6864412342287:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
Received signal 11 SEGV_MAPERR 600001000000
 [0x0001032c8bee]
 [0x0001032c8c55]
 [0x0001032c8b96]
 [0x000115e49bba]
 [0x000123882328]
 [0x0001066ed0cf]
 [0x000102fdda50]
 [0x0001128a91d1]
 [0x00010e67e296]
 [0x00010f465cc0]
 [0x00010397d105]
 [0x00010209330f]
 [0x000102093335]
 [0x000102092415]
 [0x000102092439]
 [0x000103945d5b]
 [0x0001039704ce]
 [0x000103943cd2]
 [0x000103945bb5]
 [0x0001039474ec]
 [0x00010395cbc9]
 [0x00010397337e]
 [0x00010395c7e2]
 [0x00010395c6d5]
 [0x000103638501]
 [0x000103637a4a]
 [0x00010363b27c]
 [0x00010f4c8f48]
 [0x00010e6c3964]
 [0x00010e6c35f3]
 [0x00010e6c317a]
 [0x00010e6baf01]
 [0x00010e6ba494]
 [0x00011363fa6f]
 [0x00010cdf1f34]
 [0x00010363b562]
 [0x00010363791f]
 [0x000101b6c395]
 [0x000101b6c2b4]
 [0x000101b6c25d]
 [0x000101b6c17c]
 [0x000103e82ccb]
 [0x00010363d594]
 [0x000101b6bed9]
 [0x000115b0068d]
[end of stack trace]