Do not call NSS functions if NSS initialization failed....

net/base/x509_certificate_nss.cc

Index: net/base/x509_certificate_nss.cc
===================================================================
--- net/base/x509_certificate_nss.cc	(revision 44427)
+++ net/base/x509_certificate_nss.cc	(working copy)
@@ -5,6 +5,7 @@
 #include "net/base/x509_certificate.h"
 
 #include <cert.h>
+#include <nss.h>
 #include <pk11pub.h>
 #include <prerror.h>
 #include <prtime.h>
@@ -722,6 +723,9 @@
     const char* data, int length) {
   base::EnsureNSSInit();
 
+  if (!NSS_IsInitialized())
+    return NULL;
+
   // Make a copy of |data| since CERT_DecodeCertPackage might modify it.
   char* data_copy = new char[length];
   memcpy(data_copy, data, length);