There are repeated failures in this swarming task: https://chromium-swarm.appspot.com/task?id=40e3f66b127ba910&refresh=10&show_raw=1

On this CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1305201/8

The build later passes on retry:
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/android-kitkat-arm-rel/115478

I'm not sure what's going wrong here.

"""

I  863.085s run_tests_on_device(06b2a92a003bca26)  [ RUN      ] SignedExchangeRequestHandlerBrowserTest/SignedExchangeRequestHandlerBrowserTest.Expired/0
I  863.085s run_tests_on_device(06b2a92a003bca26)  [WARNING:dns_config_service_posix.cc(334)] Failed to read DnsConfig.
I  863.085s run_tests_on_device(06b2a92a003bca26)  [WARNING:child_process_launcher_helper_posix.cc(124)] Ignoring invalid file assets/snapshot_blob_64.bin
I  863.086s run_tests_on_device(06b2a92a003bca26)  Finished running tests on this device.
I  863.115s Main  FINISHED TRY #2/3
I  863.115s Main  1 failed tests remain.
I  863.115s Main  STARTING TRY #3/3
I  863.116s Main  Attempting to recover devices prior to last test attempt.
I  863.124s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'sd_card_ready' met (0.0s)
I  863.694s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'pm_ready' met (0.6s)
I  863.703s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'boot_completed' met (0.6s)
I  864.201s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'device_offline' met (0.5s)
I  877.850s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'sd_card_ready' met (13.6s)
I  878.509s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'pm_ready' not met (14.3s)
I  884.087s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'pm_ready' not met (19.9s)
I  889.701s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'pm_ready' met (25.5s)
I  889.710s TimeoutThread-1-for-RecoverDevice(06b2a92a003bca26)  condition 'boot_completed' met (25.5s)
I  889.725s Main  Will run 1 tests on 1 devices: 06b2a92a003bca26
W  889.804s run_tests_on_device(06b2a92a003bca26)  No tombstones to clear.
I  892.270s run_tests_on_device(06b2a92a003bca26)  flags:
I  892.270s run_tests_on_device(06b2a92a003bca26)    --enable-features=NetworkService
I  892.293s TimeoutThread-1-for-run_tests_on_device(06b2a92a003bca26)  Large shell command will be run from file: ( p=org.chromium.content_browsertests_apk;am instrument -w -e org.chromium.native_test.NativeTestInstrumentationTestRunner.ShardSizeLimit 1 -e org.chromium.native_test.NativeTestInstrumentationTestRunner.ShardNanoTimeout 120000000000 -e org.chromium.native_test.NativeTestInstrumentationTestRunner.Test SignedExchangeRequestHandlerBrowserTest/SignedExchangeRequestHandlerBrowserTest.Expired/0 -e org.chromium.native_test.NativeTestInstrumentationTestRunner.StdoutFile /storage/emulated/legacy/temp_file-e62051796 ...
I  952.326s run_tests_on_device(06b2a92a003bca26)  Still working on StartInstrumentation(06b2a92a003bca26, org.chromium.content_browsertests_apk/org.chromium.native_test.NativeTestInstrumentationTestRunner, retries=0, extras={'org.chromium.native_test.NativeTestInstrumentationTestRunner.ShardSizeLimit': 1, 'org.chromium.native_test.NativeTestInstrumentationTestRunner.ShardNanoTimeout': 120000000000, 'org.chromium.native_test.NativeTestInstrumentationTestRunner.Test': 'SignedExchangeRequestHandlerBrowserTest/SignedExchangeRequestHandlerBrowserTest.Expired/0', 'org.chromium.native_test.NativeTestInstrumentationTestRunner.StdoutFile': '/storage/emulated/legacy/temp_file-e62051796af97.gtest_out', 'org.chromium.native_test.NativeTestInstrumentationTestRunner.NativeTestActivity': 'org.chromium.content_browsertests_apk.ContentBrowserTestsActivity', 'org.chromium.native_test.NativeTest.CommandLineFlags': '--enable-features=NetworkService'}, timeout=1200.0, raw=False)
I 1012.368s run_tests_on_device(06b2a92a003bca26)  Still working on StartInstrumentation(06b2a92a003bca26, org.chromium.content_browsertests_apk/org.chromium.native_test.NativeTestInstrumentationTestRunner, retries=0, extras={'org.chromium.native_test.NativeTestInstrumentationTestRunner.ShardSizeLimit': 1, 'org.chromium.native_test.NativeTestInstrumentationTestRunner.ShardNanoTimeout': 120000000000, 'org.chromium.native_test.NativeTestInstrumentationTestRunner.Test': 'SignedExchangeRequestHandlerBrowserTest/SignedExchangeRequestHandlerBrowserTest.Expired/0', 'org.chromium.native_test.NativeTestInstrumentationTestRunner.StdoutFile': '/storage/emulated/legacy/temp_file-e62051796af97.gtest_out', 'org.chromium.native_test.NativeTestInstrumentationTestRunner.NativeTestActivity': 'org.chromium.content_browsertests_apk.ContentBrowserTestsActivity', 'org.chromium.native_test.NativeTest.CommandLineFlags': '--enable-features=NetworkService'}, timeout=1200.0, raw=False)
I 1014.949s run_tests_on_device(06b2a92a003bca26)  /storage/emulated/legacy/temp_file-e62051796af97.gtest_out size on device: 706
I 1014.997s run_tests_on_device(06b2a92a003bca26)  Logcat saved to https://luci-logdog.appspot.com/v/?s=chromium%2Fandroid%2Fswarming%2Flogcats%2F40e3f66b127ba911%2F%2B%2Flogcat_logcat_961723822317079019_20181031T173628-UTC_06b2a92a003bca26
I 1014.997s archive  Writing text to logdog stream, logcat_logcat_961723822317079019_20181031T173628-UTC_06b2a92a003bca26
I 1015.699s run_tests_on_device(06b2a92a003bca26)  [INFO:test_support_android.cc(222)] MessagePumpForUIFactory already set, unable to override.
I 1015.699s run_tests_on_device(06b2a92a003bca26)  >>ScopedMainEntryLogger
I 1015.699s run_tests_on_device(06b2a92a003bca26)  Note: Google Test filter = SignedExchangeRequestHandlerBrowserTest/SignedExchangeRequestHandlerBrowserTest.Expired/0
"""