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

net_unittests failing on chromium.mac/Mac10.10 Tests

Builders failed on: 
- Mac10.10 Tests: 
  https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.10%20Tests

Log:
They are all caused by the same server start failure.

[  RUN      ] SSLClientSocketReadTest.Read_FullDuplex/0
[26041:779:0629/075729.808874:20538456977974:ERROR:local_test_server_posix.cc(81)] poll() timed out; bytes_read=0
[26041:779:0629/075729.809090:20538457177630:ERROR:local_test_server_posix.cc(169)] Could not read server_data_len
[26041:779:0629/075729.813961:20538462044811:ERROR:ssl_client_socket_unittest.cc(867)] Could not start SpawnedTestServer
../../net/socket/ssl_client_socket_unittest.cc:1616: Failure
Value of: StartTestServer(SpawnedTestServer::SSLOptions())
  Actual: false
Expected: true
Stack trace:
0   net_unittests                       0x0000000105c136db testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop(int) + 91
1   net_unittests                       0x0000000105c13099 testing::internal::AssertHelper::operator=(testing::Message const&) const + 89
2   net_unittests                       0x00000001050db0d5 net::SSLClientSocketReadTest_Read_FullDuplex_Test::TestBody() + 437
[  FAILED  ] SSLClientSocketReadTest.Read_FullDuplex/0, where GetParam() = false (10023 ms)