Remove unnecessary assignment in transport_client_socket_unittest.cc.

This is part of Chrome for Android upstreaming.

This line was introduced by r137387 which turned |sock| into a scoped_refptr
rather than a raw pointer (that needed to be initialized). This assignment is
obviously not needed anymore.

Internally we don't have this extra '= NULL' which causes an unnecessary diff.

BUG=136750


Review URL: https://chromiumcodereview.appspot.com/10855123

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151276 0039d316-1c4b-4281-b951-d872f2087c98

net/socket/transport_client_socket_unittest.cc

@@ -103,7 +103,7 @@ void TransportClientSocketTest::SetUp() {
   ::testing::TestWithParam<ClientSocketTestTypes>::SetUp();
 
   // Find a free port to listen on
-  scoped_refptr<TCPListenSocket> sock = NULL;
+  scoped_refptr<TCPListenSocket> sock;
   int port;
   // Range of ports to listen on.  Shouldn't need to try many.
   const int kMinPort = 10100;