Introduce content_nacl_nonsfi.gyp for nacl_helper_nonsfi.

content/common/child_process_sandbox_support_impl_linux.cc

Index: content/common/child_process_sandbox_support_impl_linux.cc
diff --git a/content/common/child_process_sandbox_support_impl_linux.cc b/content/common/child_process_sandbox_support_impl_linux.cc
index 5cc8144e5ec68db2d117659abdffd486a5644b75..4240f1568a105fe48a035df4b9be3aafd9ef1b3a 100644
--- a/content/common/child_process_sandbox_support_impl_linux.cc
+++ b/content/common/child_process_sandbox_support_impl_linux.cc
@@ -17,7 +17,6 @@
 #include "base/posix/unix_domain_socket_linux.h"
 #include "base/sys_byteorder.h"
 #include "content/common/sandbox_linux/sandbox_linux.h"
-#include "content/common/zygote_commands_linux.h"
 #include "third_party/WebKit/public/platform/linux/WebFallbackFont.h"
 #include "third_party/WebKit/public/platform/linux/WebFontRenderStyle.h"
 
@@ -205,11 +204,4 @@ bool GetFontTable(int fd, uint32_t table_tag, off_t offset,
   return true;
 }
 
-bool SendZygoteChildPing(int fd) {
-  return UnixDomainSocket::SendMsg(fd,
-                                   kZygoteChildPingMessage,
-                                   sizeof(kZygoteChildPingMessage),
-                                   std::vector<int>());
-}
-
 }  // namespace content