This run of chrome_public_test_apk seems to be missing much results data.
https://uberchromegw.corp.google.com/i/tryserver.chromium.android/builders/linux_android_rel_ng/builds/220185

From the results.json file for that run of chrome_public_test_apk we have entries that look like....

      "org.chromium.chrome.browser.omaha.UpdateMenuItemHelperTest#testNoVersionKnown": [
        {
          "elapsed_time_ms": 0,
          "logcat_url": "",
          "losless_snippet": "",
          "output_snippet": "",
          "output_snippet_base64:": "",
          "status": null,
          "tombstones": ""
        },
        {
          "elapsed_time_ms": 0,
          "logcat_url": "",
          "losless_snippet": "",
          "output_snippet": "",
          "output_snippet_base64:": "",
          "status": null,
          "tombstones": ""
        },
        {
          "elapsed_time_ms": 0,
          "logcat_url": "",
          "losless_snippet": "",
          "output_snippet": "",
          "output_snippet_base64:": "",
          "status": null,
          "tombstones": ""
        }

This doesn't seem at all correct considering that we have an assertion in our test_runner that 'status' is one of a list of strings.
https://cs.chromium.org/chromium/src/build/android/pylib/base/base_test_result.py?q=package:chromium&l=54

results.json:
https://isolateserver.appspot.com/browse?namespace=default-gzip&digest=686f2da0a0fc05b46ca44b97199124550ddf9d6c



Also there is no mention of that specific test ^ anywhere in the logcat file....

logcat:
https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Ftryserver.chromium.android%2Flinux_android_rel_ng%2F220185%2F%2B%2Frecipes%2Fsteps%2Fchrome_public_test_apk__with_patch__on_Android%2F0%2Fstdout