BSD port: USE_NSS and other macros instead of OS_LINUX where applicable

net/base/ev_root_ca_metadata.cc

Index: net/base/ev_root_ca_metadata.cc
===================================================================
--- net/base/ev_root_ca_metadata.cc	(revision 37474)
+++ net/base/ev_root_ca_metadata.cc	(working copy)
@@ -4,7 +4,7 @@
 
 #include "net/base/ev_root_ca_metadata.h"
 
-#if defined(OS_LINUX)
+#if defined(USE_NSS)
 #include <cert.h>
 #include <pkcs11n.h>
 #include <secerr.h>
@@ -232,7 +232,7 @@
 
 EVRootCAMetadata::EVRootCAMetadata() {
   // Constructs the object from the raw metadata in ev_root_ca_metadata.
-#if defined(OS_LINUX)
+#if defined(USE_NSS)
   for (size_t i = 0; i < arraysize(ev_root_ca_metadata); i++) {
     const EVMetadata& metadata = ev_root_ca_metadata[i];
     PRUint8 buf[1024];