Added unit test for DevTools' ephemeral port support.

net/socket/stream_listen_socket.cc

Index: net/socket/stream_listen_socket.cc
diff --git a/net/socket/stream_listen_socket.cc b/net/socket/stream_listen_socket.cc
index fd164a556d5b3f0235794e4e939be61f4cd7459d..a49a9d3e63d60e18525d526acc7cf9dfe353ae42 100644
--- a/net/socket/stream_listen_socket.cc
+++ b/net/socket/stream_listen_socket.cc
@@ -86,18 +86,7 @@ void StreamListenSocket::Send(const string& str, bool append_linefeed) {
 }
 
 int StreamListenSocket::GetLocalAddress(IPEndPoint* address) {
-  SockaddrStorage storage;
-  if (getsockname(socket_, storage.addr, &storage.addr_len)) {
-#if defined(OS_WIN)
-    int err = WSAGetLastError();
-#else
-    int err = errno;
-#endif
-    return MapSystemError(err);
-  }
-  if (!address->FromSockAddr(storage.addr, storage.addr_len))
-    return ERR_ADDRESS_INVALID;
-  return OK;
+  return GetLocalAddressImpl(address);
 }
 
 int StreamListenSocket::GetPeerAddress(IPEndPoint* address) {
@@ -242,6 +231,21 @@ void StreamListenSocket::UnwatchSocket() {
 #endif
 }
 
+int StreamListenSocket::GetLocalAddressImpl(IPEndPoint* address) {
+  SockaddrStorage storage;
+  if (getsockname(socket_, storage.addr, &storage.addr_len)) {
+#if defined(OS_WIN)
+    int err = WSAGetLastError();
+#else
+    int err = errno;
+#endif
+    return MapSystemError(err);
+  }
+  if (!address->FromSockAddr(storage.addr, storage.addr_len))
+    return ERR_ADDRESS_INVALID;
+  return OK;
+}
+
 // TODO(ibrar): We can add these functions into OS dependent files.
 #if defined(OS_WIN)
 // MessageLoop watcher callback.