Fixing a bunch of dartc errors in dart:html tests.

tests/html/htmlelement_test.dart

Index: tests/html/htmlelement_test.dart
diff --git a/tests/html/htmlelement_test.dart b/tests/html/htmlelement_test.dart
index f9455dfa33f85e905cd756bd3ad92436d39e490a..7c5e5a08843a85a087e90c9c18f5eedf06d1629a 100644
--- a/tests/html/htmlelement_test.dart
+++ b/tests/html/htmlelement_test.dart
@@ -61,7 +61,7 @@ main() {
 
     final keys = <String> [];
     final values = <String> [];
-    div.dataAttributes.forEach(void f(String key, String value) {

[Emily Fortuna, 2012/12/21 00:44:18]

I thought this was supported? no longer?

[blois, 2012/12/21 01:05:42]

It's supported, just needed to remove the return value and function name.

[Emily Fortuna, 2012/12/21 01:07:31]

Oh okay. I thought for some reason that the vm and dart2js supported actually 
having the return value and function name, just not dart2js.

[blois, 2012/12/21 01:13:17]

Dartc was saying it's deprecated, but I don't know other than that. 

Removing them allows it to pass, so seems like a good thing :)

+    div.dataAttributes.forEach((String key, String value) {
         keys.add(key);
         values.add(value);
     });