dart:io | Change the way SecureSocket initializes the NSS library with an empty database.

tests/standalone/io/secure_no_builtin_roots_database_test.dart

Index: tests/standalone/io/secure_no_builtin_roots_database_test.dart
diff --git a/tests/standalone/io/secure_no_builtin_roots_test.dart b/tests/standalone/io/secure_no_builtin_roots_database_test.dart
similarity index 70%
copy from tests/standalone/io/secure_no_builtin_roots_test.dart
copy to tests/standalone/io/secure_no_builtin_roots_database_test.dart
index a93404c2c767d4144dc611456c78faefb59bae78..078ba706b10f3587dcfe7b24bcb780d7ee86eacb 100644
--- a/tests/standalone/io/secure_no_builtin_roots_test.dart
+++ b/tests/standalone/io/secure_no_builtin_roots_database_test.dart
@@ -24,8 +24,13 @@ void testGoogleUrl() {
 
 void InitializeSSL() {
   // If the built-in root certificates aren't loaded, the connection
-  // should signal an error.
-  SecureSocket.initialize(useBuiltinRoots: false);
+  // should signal an error.  Even when an external database is loaded,
+  // they should not be loaded.
+  Path scriptDir = new Path(new Options().script).directoryPath;
+  Path certificateDatabase = scriptDir.append('pkcert');
+  SecureSocket.initialize(database: certificateDatabase.toNativePath(),
+                          password: 'dartdart',
+                          useBuiltinRoots: false);
 }
 
 void main() {