PPB_TCPSocket: add support for TCP server socket operations.

ppapi/proxy/tcp_socket_private_resource.h

Index: ppapi/proxy/tcp_socket_private_resource.h
diff --git a/ppapi/proxy/tcp_socket_private_resource.h b/ppapi/proxy/tcp_socket_private_resource.h
index f79ab9df07e71636fef0ff08fa3edfec4ad12d64..9ae9bb2d93950e20161394db99d0440b899e2312 100644
--- a/ppapi/proxy/tcp_socket_private_resource.h
+++ b/ppapi/proxy/tcp_socket_private_resource.h
@@ -59,6 +59,12 @@ class PPAPI_PROXY_EXPORT TCPSocketPrivateResource
                             const PP_Var& value,
                             scoped_refptr<TrackedCallback> callback) OVERRIDE;
 
+  // TCPSocketResourceBase implementation.
+  virtual PP_Resource CreateAcceptedSocket(
+      int pending_host_id,
+      const PP_NetAddress_Private& local_addr,
+      const PP_NetAddress_Private& remote_addr) OVERRIDE;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(TCPSocketPrivateResource);
 };