The Zip unit-tests fail only on the build bots (not on the try bots or locally) in ZipTest::TestUnzipFile().
Somehow it seems we fail building the original test file full path, so instead of comparing the expected file and the unzipped file, we compare the directory containing the expected file.


[ RUN      ] ZipTest.Zip
../../third_party/zlib/google/zip_unittest.cc:205: Failure
Value of: base::ContentsEqual(original_path, unzipped_entry_path)
  Actual: false
Expected: true
Contents differ between original /b/s/w/ir/third_party/zlib/google/test/data/test and unzipped filed /b/s/w/itB8QZYI/.org.chromium.Chromium.50CtEC/foo.txt
../../third_party/zlib/google/zip_unittest.cc:205: Failure
Value of: base::ContentsEqual(original_path, unzipped_entry_path)
  Actual: false
Expected: true
Contents differ between original /b/s/w/ir/third_party/zlib/google/test/data/test and unzipped filed /b/s/w/itB8QZYI/.org.chromium.Chromium.50CtEC/foo/bar.txt
../../third_party/zlib/google/zip_unittest.cc:205: Failure
Value of: base::ContentsEqual(original_path, unzipped_entry_path)
  Actual: false
Expected: true
Contents differ between original /b/s/w/ir/third_party/zlib/google/test/data/test and unzipped filed /b/s/w/itB8QZYI/.org.chromium.Chromium.50CtEC/foo/bar/baz.txt
../../third_party/zlib/google/zip_unittest.cc:205: Failure
Value of: base::ContentsEqual(original_path, unzipped_entry_path)
  Actual: false
Expected: true
Contents differ between original /b/s/w/ir/third_party/zlib/google/test/data/test and unzipped filed /b/s/w/itB8QZYI/.org.chromium.Chromium.50CtEC/foo/bar/.hidden
../../third_party/zlib/google/zip_unittest.cc:205: Failure
Value of: base::ContentsEqual(original_path, unzipped_entry_path)
  Actual: false
Expected: true
Contents differ between original /b/s/w/ir/third_party/zlib/google/test/data/test and unzipped filed /b/s/w/itB8QZYI/.org.chromium.Chromium.50CtEC/foo/bar/quux.txt
[  FAILED  ] ZipTest.Zip (3 ms)