def PostUploadHook(cl, change, output_api):
  """git cl upload will call this hook after the issue is created/modified.

  This hook modifies the CL description in order to run extra GPU
  tests (in particular, the WebGL 2.0 conformance tests) in addition
  to the regular CQ try bots. This test suite is too large to run
  against all Chromium commits, but should be run against changes
  likely to affect these tests.
  """
  return output_api.EnsureCQIncludeTrybotsAreAdded(
    cl,
    [
      'master.tryserver.chromium.linux:linux_optional_gpu_tests_rel',
      'master.tryserver.chromium.mac:mac_optional_gpu_tests_rel',
      'master.tryserver.chromium.win:win_optional_gpu_tests_rel',
      'master.tryserver.chromium.android:android_optional_gpu_tests_rel',
    ],
    'Automatically added optional GPU tests to run on CQ.')