Filed by sheriff-o-matic@appspot.gserviceaccount.com on behalf of thestig@chromium.org

net_unittests failing on chromium.mac/Mac10.12 Tests

Builders failed on: 
- Mac10.12 Tests: 
 
Examples:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.12%20Tests/17709
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.12%20Tests/17718
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.12%20Tests/17719

[ RUN      ] WebSocketEndToEndTest.ProxyPacUsed
[48004:775:1217/064306.964463:26786258498693:ERROR:local_test_server_posix.cc(79)] poll() timed out; bytes_read=0
[48004:775:1217/064306.964508:26786258536678:ERROR:local_test_server_posix.cc(167)] Could not read server_data_len
../../net/websockets/websocket_end_to_end_test.cc:442: Failure
Value of: proxy_server.BlockUntilStarted()
  Actual: false
Expected: true

[ RUN      ] WebSocketEndToEndTest.BasicSmokeTest
[11709:775:1217/130641.783502:7552187449308:ERROR:local_test_server_posix.cc(79)] poll() timed out; bytes_read=0
[11709:775:1217/130641.783607:7552187531720:ERROR:local_test_server_posix.cc(167)] Could not read server_data_len
../../net/websockets/websocket_end_to_end_test.cc:305: Failure
Value of: ws_server.Start()
  Actual: false
Expected: true