Flaky failures of cros_run_vm_test:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/chromeos-amd64-generic-rel/19715
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/chromeos-amd64-generic-rel/19728
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/chromeos-amd64-generic-rel/19833

Stack:
06:25:49: INFO: RunCommand: deploy_chrome --force --build-dir out_amd64-generic/Release --process-timeout 180 --to localhost --port 9222 --board amd64-generic --cache-dir /b/s/w/ir/build/cros_cache
06:25:49: INFO: Preparing device
06:25:49: INFO: Testing connection to the device...
06:25:50: INFO: Shutting down Chrome...
06:25:53: INFO: SDK: Fetching gs://chromeos-image-archive/amd64-generic-full/R70-11021.0.0-rc2/environment_chromeos-base_chromeos-chrome.tar.xz
06:25:58: INFO: Copying Chrome to /opt/google/chrome on device...
rsync is not found on the device.
Run dev_install on the device to get rsync installed
cros_run_vm_test: Unhandled exception:
Traceback (most recent call last):
  File "/b/s/w/ir/third_party/chromite/bin/cros_run_vm_test", line 169, in <module>
    DoMain()
  File "/b/s/w/ir/third_party/chromite/bin/cros_run_vm_test", line 165, in DoMain
    commandline.ScriptWrapperMain(FindTarget)
  File "/b/s/w/ir/third_party/chromite/lib/commandline.py", line 912, in ScriptWrapperMain
    ret = target(argv[1:])
  File "/b/s/w/ir/third_party/chromite/scripts/cros_run_vm_test.py", line 407, in main
    return VMTest(ParseCommandLine(argv)).Run()
  File "/b/s/w/ir/third_party/chromite/scripts/cros_run_vm_test.py", line 72, in Run
    self._Deploy()
  File "/b/s/w/ir/third_party/chromite/scripts/cros_run_vm_test.py", line 124, in _Deploy
    cros_build_lib.RunCommand(deploy_cmd)
  File "/b/s/w/ir/third_party/chromite/lib/cros_build_lib.py", line 647, in RunCommand
    raise RunCommandError(msg, cmd_result)
chromite.lib.cros_build_lib.RunCommandError: return code: 1; command: deploy_chrome --force --build-dir out_amd64-generic/Release --process-timeout 180 --to localhost --port 9222 --board amd64-generic --cache-dir /b/s/w/ir/build/cros_cache
cmd=['deploy_chrome', '--force', '--build-dir', 'out_amd64-generic/Release', '--process-timeout', '180', '--to', 'localhost', '--port', '9222', '--board', 'amd64-generic', '--cache-dir', '/b/s/w/ir/build/cros_cache']
06:25:59: DEBUG: Stop VM