Fix crash bug in SpdyProxyClientSocket.GetPeerAddress where

net/spdy/spdy_proxy_client_socket_unittest.cc

Index: net/spdy/spdy_proxy_client_socket_unittest.cc
===================================================================
--- net/spdy/spdy_proxy_client_socket_unittest.cc	(revision 112347)
+++ net/spdy/spdy_proxy_client_socket_unittest.cc	(working copy)
@@ -612,6 +612,12 @@
   EXPECT_TRUE(sock_->IsConnected());
   EXPECT_EQ(OK, sock_->GetPeerAddress(&addr));
 
+  Run(1);
+
+  // Socket is now closed, but still connected
+  EXPECT_TRUE(sock_->IsConnected());
+  EXPECT_EQ(OK, sock_->GetPeerAddress(&addr));
+
   sock_->Disconnect();
   EXPECT_EQ(ERR_SOCKET_NOT_CONNECTED, sock_->GetPeerAddress(&addr));
 }