Support building BoringSSL with NSS certificates.

net/test/cert_test_util_nss.cc

Index: net/test/cert_test_util_nss.cc
diff --git a/net/test/cert_test_util_nss.cc b/net/test/cert_test_util_nss.cc
index ee929e5a41fac9f9b78ec563b80c78ca9d61ce0a..fa3e31ec141c6b2fc8c2d49d8780d16121610c38 100644
--- a/net/test/cert_test_util_nss.cc
+++ b/net/test/cert_test_util_nss.cc
@@ -19,6 +19,14 @@ scoped_ptr<crypto::RSAPrivateKey> ImportSensitiveKeyFromFile(
     const base::FilePath& dir,
     const std::string& key_filename,
     PK11SlotInfo* slot) {
+#if defined(USE_OPENSSL)
+  // TODO(davidben): Port RSAPrivateKey::CreateSensitiveFromPrivateKeyInfo away
+  // from RSAPrivateKey so it doesn't make assumptions about the internal crypto
+  // library. Instead, return a ScopedSECKEYPrivateKey or have this function
+  // just return bool.
+  NOTIMPLEMENTED();
+  return nullptr;
+#else
   base::FilePath key_path = dir.AppendASCII(key_filename);
   std::string key_pkcs8;
   bool success = base::ReadFileToString(key_path, &key_pkcs8);
@@ -38,6 +46,7 @@ scoped_ptr<crypto::RSAPrivateKey> ImportSensitiveKeyFromFile(
   LOG_IF(ERROR, !private_key) << "Could not create key from file "
                               << key_path.value();
   return private_key.Pass();
+#endif
 }
 
 bool ImportClientCertToSlot(const scoped_refptr<X509Certificate>& cert,