It's hard drive is full.

https://build.chromium.org/p/tryserver.chromium.win/buildslaves/vm405-m4

Traceback (most recent call last):
  File "../../../scripts/slave/remote_run.py", line 705, in main
    return _main_impl(argv, stream)
  File "../../../scripts/slave/remote_run.py", line 671, in _main_impl
    cleanup_temp.Cleanup(b_dir=basedir)
  File "E:\b\build\scripts\slave\cleanup_temp.py", line 240, in Cleanup
    _CleanupWindows(b_dir=b_dir)
  File "E:\b\build\scripts\slave\cleanup_temp.py", line 173, in _CleanupWindows
    check_free_space_path('e:\\')
  File "E:\b\build\scripts\slave\cleanup_temp.py", line 153, in check_free_space_path
    raise FullDriveException(path, free_space)
FullDriveException