Update from https://crrev.com/303153

base/posix/unix_domain_socket_linux.h

Index: base/posix/unix_domain_socket_linux.h
diff --git a/base/posix/unix_domain_socket_linux.h b/base/posix/unix_domain_socket_linux.h
index 5281875d7b333d333047fc6eedd3e9083a9980fe..142cb146b223c048dc993d3538aeb0e02e833c07 100644
--- a/base/posix/unix_domain_socket_linux.h
+++ b/base/posix/unix_domain_socket_linux.h
@@ -21,12 +21,12 @@ class BASE_EXPORT UnixDomainSocket {
   // Maximum number of file descriptors that can be read by RecvMsg().
   static const size_t kMaxFileDescriptors;
 
-#if !defined(__native_client_nonsfi__)
+#if !defined(OS_NACL_NONSFI)
   // Use to enable receiving process IDs in RecvMsgWithPid.  Should be called on
   // the receiving socket (i.e., the socket passed to RecvMsgWithPid). Returns
   // true if successful.
   static bool EnableReceiveProcessId(int fd);
-#endif  // !defined(__native_client_nonsfi__)
+#endif  // !defined(OS_NACL_NONSFI)
 
   // Use sendmsg to write the given msg and include a vector of file
   // descriptors. Returns true if successful.
@@ -52,7 +52,7 @@ class BASE_EXPORT UnixDomainSocket {
                                 ScopedVector<base::ScopedFD>* fds,
                                 base::ProcessId* pid);
 
-#if !defined(__native_client_nonsfi__)
+#if !defined(OS_NACL_NONSFI)
   // Perform a sendmsg/recvmsg pair.
   //   1. This process creates a UNIX SEQPACKET socketpair. Using
   //      connection-oriented sockets (SEQPACKET or STREAM) is critical here,
@@ -85,7 +85,7 @@ class BASE_EXPORT UnixDomainSocket {
                                       int recvmsg_flags,
                                       int* result_fd,
                                       const Pickle& request);
-#endif  // !defined(__native_client_nonsfi__)
+#endif  // !defined(OS_NACL_NONSFI)
  private:
   // Similar to RecvMsg, but allows to specify |flags| for recvmsg(2).
   static ssize_t RecvMsgWithFlags(int fd,