Update Linux to use scoped_refptr<T>::get() rather than implicit "operator T*"

net/cert/nss_cert_database.h

Index: net/cert/nss_cert_database.h
diff --git a/net/cert/nss_cert_database.h b/net/cert/nss_cert_database.h
index b9581488a38eaaf838293973aa401e35a2e9020a..9db1b75d973dcd84adb9390126f88b21518d1434 100644
--- a/net/cert/nss_cert_database.h
+++ b/net/cert/nss_cert_database.h
@@ -54,7 +54,7 @@ class NET_EXPORT NSSCertDatabase {
   // Stores per-certificate error codes for import failures.
   struct NET_EXPORT ImportCertFailure {
    public:
-    ImportCertFailure(X509Certificate* cert, int err);
+    ImportCertFailure(const scoped_refptr<X509Certificate>& cert, int err);
     ~ImportCertFailure();
 
     scoped_refptr<X509Certificate> certificate;