Introduce content_nacl_nonsfi.gyp for nacl_helper_nonsfi.

content/common/send_zygote_child_ping_linux.cc

Index: content/common/send_zygote_child_ping_linux.cc
diff --git a/content/common/send_zygote_child_ping_linux.cc b/content/common/send_zygote_child_ping_linux.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1a4f49f8ae013d938456a8a042f4f11c714e73d4
--- /dev/null
+++ b/content/common/send_zygote_child_ping_linux.cc
@@ -0,0 +1,21 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/public/common/send_zygote_child_ping_linux.h"
+
+#include <vector>
+
+#include "base/posix/unix_domain_socket_linux.h"
+#include "content/common/zygote_commands_linux.h"
+
+namespace content {
+
+bool SendZygoteChildPing(int fd) {
+  return UnixDomainSocket::SendMsg(fd,
+                                   kZygoteChildPingMessage,
+                                   sizeof(kZygoteChildPingMessage),
+                                   std::vector<int>());
+}
+
+}  // namespace content