cronet_unittests has been consistently failing on android_cronet_tester for last few hours. 

For example, I added android_cronet_tester to this CL which is totally unrelated to Cronet (https://codereview.chromium.org/2955273002/).
Build output: https://build.chromium.org/p/tryserver.chromium.android/builders/android_cronet_tester/builds/1652:
34.769s Main  [  FAILED  ] 3 tests, listed below:
C   34.769s Main  [  FAILED  ] StaleHostResolverTest.CreatedByContext (CRASHED)
C   34.769s Main  [  FAILED  ] URLRequestContextConfigTest.SetQuicConnectionMigrationOptions (CRASHED)
C   34.769s Main  [  FAILED  ] URLRequestContextConfigTest.TestExperimentalOptionParsing (CRASHED)

Other example red builds:
https://build.chromium.org/p/tryserver.chromium.android/builders/android_cronet_tester/builds/1648
https://build.chromium.org/p/tryserver.chromium.android/builders/android_cronet_tester/builds/1649