Fixed racey testShutdown test, where echoServer was throwing an exception after trying to write to …

Fixed racey testShutdown test, where echoServer was throwing an exception after trying to write to a client socket closed for reading.

BUG=
R=zra@google.com

Committed: https://github.com/dart-lang/sdk/commit/4ebaac3d29593c8f16220a9cf57a77a8e8535a97

[bkonyi, 2017-04-24 20:56:03]

bkonyi@google.com changed reviewers:
+ zra@google.com

[zra, 2017-04-24 21:19:01]

lgtm

[bkonyi, 2017-04-24 21:21:47]

Description was changed from

==========
Fixed racey testShutdown test, where echoServer was throwing an exception after
trying to write to a client socket closed for reading.

BUG=
==========

to

==========
Fixed racey testShutdown test, where echoServer was throwing an exception after
trying to write to a client socket closed for reading.

BUG=
R=zra@google.com

Committed:
https://github.com/dart-lang/sdk/commit/4ebaac3d29593c8f16220a9cf57a77a8e8535a97
==========

[bkonyi, 2017-04-24 21:21:48]

Committed patchset #1 (id:1) manually as
4ebaac3d29593c8f16220a9cf57a77a8e8535a97 (presubmit successful).

[siva, 2017-04-27 18:28:56]

asiva@google.com changed reviewers:
+ asiva@google.com

[siva, 2017-04-27 18:28:56]

https://codereview.chromium.org/2837163002/diff/1/tests/standalone/io/raw_syn...
File tests/standalone/io/raw_synchronous_socket_test.dart (right):

https://codereview.chromium.org/2837163002/diff/1/tests/standalone/io/raw_syn...
tests/standalone/io/raw_synchronous_socket_test.dart:395:
socket.shutdown(SocketDirection.RECEIVE);
Instead of deleting the write which is a good test to see if we are still able
to write after doing a READ shutdown, why not send some data which the echo
server recognizes and does not echo it back.