Disable TCPSocketTest.BeforeConnectCallback on Fuchsia.

This test fails becasue MSG_PEEK is not implemented.

Bug: 887587
Change-Id: I6e1ba04afc1f34a11352ba0280dfc33c4436affa
Reviewed-on: https://chromium-review.googlesource.com/1235210
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592895}

net/socket/socket_posix.cc

@@ -255,7 +255,7 @@ bool SocketPosix::IsConnected() const {
   //   1. Check if the connection is alive using poll(POLLRDHUP).
   //   2. If closed, then use ioctl(FIONREAD) to check if there is data to be
   //   read.
-  // TODO(bug 738275): Remove once MSG_PEEK is implemented on Fuchsia.
+  // TODO(crbug.com/887587): Remove once MSG_PEEK is implemented on Fuchsia.
   struct pollfd pollfd;
   pollfd.fd = socket_fd_;
   pollfd.events = POLLRDHUP;
@@ -297,7 +297,7 @@ bool SocketPosix::IsConnectedAndIdle() const {
   // socket. POLLIN is signaled if the socket is readable or if it was closed by
   // the peer, i.e. the socket is connected and idle if and only if POLLIN is
   // not signaled.
-  // TODO(bug 738275): Remove once MSG_PEEK is implemented.
+  // TODO(crbug.com/887587): Remove once MSG_PEEK is implemented.
   struct pollfd pollfd;
   pollfd.fd = socket_fd_;
   pollfd.events = POLLIN;

testing/buildbot/filters/fuchsia.net_unittests.filter

@@ -26,3 +26,7 @@
 
 # Flaky, https://crbug.com/814811.
 -URLRequestTest.NetworkDelegateProxyError
+
+# SocketPosix::IsConnected has a different behavior on Fuchsia.
+# https://crbug.com/887587.
+-TCPSocketTest.BeforeConnectCallback