UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0

Steps to reproduce the problem:
1. Build leveldb_db_test
2. run leveldb_db_test

What is the expected behavior?
Test should finish without failures.

What went wrong?
Test reports failure:

==== Test DBTest.DestroyEmptyDir
../../third_party/leveldatabase/src/db/db_test.cc:1659: failed: 2 == 0

Did this work before? N/A 

Chrome version: r575971  Channel: n/a
OS Version: Ubuntu 16.04
Flash Version: Shockwave Flash 30.0 r0

Test assumes at [1] that used env does not filter out '.' and '..' special files, and this is true when using GetChildren() from posix_env.cc [2]. 

But this is not true for Chromium's implementation of GetChildren() [3] which uses GetDirectoryEntries() [4], where '.' and '..' are filtered out.

[1] https://cs.chromium.org/chromium/src/third_party/leveldatabase/src/db/db_test.cc?l=1658
[2] https://cs.chromium.org/chromium/src/third_party/leveldatabase/src/util/env_posix.cc?l=465
[3] https://cs.chromium.org/chromium/src/third_party/leveldatabase/env_chromium.cc?type=cs&q=env_chromium.cc&g=0&l=862
[4] https://cs.chromium.org/chromium/src/third_party/leveldatabase/env_chromium.cc?l=68