Introduce content_nacl_nonsfi.gyp for nacl_helper_nonsfi.

content/public/common/send_zygote_child_ping_linux.h

+// 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.
+
+#ifndef CONTENT_PUBLIC_COMMON_SEND_ZYGOTE_CHILD_PING_LINUX_H_
+#define CONTENT_PUBLIC_COMMON_SEND_ZYGOTE_CHILD_PING_LINUX_H_
+
+#include "content/common/content_export.h"
+
+namespace content {
+
+// Sends a zygote child "ping" message to browser process via socket |fd|.
+// Returns true on success.
+CONTENT_EXPORT bool SendZygoteChildPing(int fd);
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_SEND_ZYGOTE_CHILD_PING_LINUX_H_