dart:io | Add two more tests for SecureSocket builtin certificates.

tests/standalone/io/secure_builtin_roots_test.dart

Index: tests/standalone/io/secure_builtin_roots_test.dart
diff --git a/tests/standalone/io/secure_no_builtin_roots_test.dart b/tests/standalone/io/secure_builtin_roots_test.dart
similarity index 75%
copy from tests/standalone/io/secure_no_builtin_roots_test.dart
copy to tests/standalone/io/secure_builtin_roots_test.dart
index a93404c2c767d4144dc611456c78faefb59bae78..edfffad2b0f375b3971b8e520de5b7e85a530dc1 100644
--- a/tests/standalone/io/secure_no_builtin_roots_test.dart
+++ b/tests/standalone/io/secure_builtin_roots_test.dart
@@ -13,19 +13,17 @@ void testGoogleUrl() {
   HttpClient client = new HttpClient();
   client.getUrl(Uri.parse('https://www.google.com'))
       .then((request) => request.close())
-      .then((response) => Expect.fail("Unexpected successful connection"))
-      .catchError((error) {
-        Expect.isTrue(error is AsyncError);
-        Expect.isTrue(error.error is SocketIOException);
-        keepAlive.close();
+      .then((response) => response.last)
+      .then((_) {
         client.close();
+        keepAlive.close();
       });
 }
 
 void InitializeSSL() {
   // If the built-in root certificates aren't loaded, the connection
   // should signal an error.
-  SecureSocket.initialize(useBuiltinRoots: false);
+  SecureSocket.initialize(useBuiltinRoots: true);
 }
 
 void main() {