Fix hmac_md5_test.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1351943005 .
diff --git a/test/hmac_md5_test.dart b/test/hmac_md5_test.dart
index 80ca6b7..f1fae7c 100644
--- a/test/hmac_md5_test.dart
+++ b/test/hmac_md5_test.dart
@@ -11,7 +11,7 @@
   group("standard vector", () {
     for (var i = 0; i < _inputs.length; i++) {
       test(_macs[i], () {
-        expectHmacEquals(new SHA1(), _inputs[i], _keys[i], _macs[i]);
+        expectHmacEquals(new MD5(), _inputs[i], _keys[i], _macs[i]);
       });
     }
   });
@@ -21,7 +21,7 @@
 const _inputs = const [
   const [ 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 ],
   const [ 0x77, 0x68, 0x61, 0x74, 0x20, 0x64, 0x6f, 0x20, 0x79, 0x61, 0x20, 0x77, 0x61, 0x6e, 0x74, 0x20, 0x66, 0x6f, 0x72, 0x20, 0x6e, 0x6f, 0x74, 0x68, 0x69, 0x6e, 0x67, 0x3f ],
-  const [ 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd ],
+  const [ 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd,0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd ],
   const [ 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd ],
   const [ 0x54, 0x65, 0x73, 0x74, 0x20, 0x57, 0x69, 0x74, 0x68, 0x20, 0x54, 0x72, 0x75, 0x6e, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e ],
   const [ 0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x69, 0x6e, 0x67, 0x20, 0x4c, 0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x54, 0x68, 0x61, 0x6e, 0x20, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x53, 0x69, 0x7a, 0x65, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x2d, 0x20, 0x48, 0x61, 0x73, 0x68, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x46, 0x69, 0x72, 0x73, 0x74 ],