Generate dart:html bindings for Dartium as well as Frog. All unittests now pass (or are disabled fo…

client/html/generated/html/frog/CSSStyleSheet.dart

+
+class _CSSStyleSheetImpl extends _StyleSheetImpl implements CSSStyleSheet native "*CSSStyleSheet" {
+
+  final _CSSRuleListImpl cssRules;
+
+  final _CSSRuleImpl ownerRule;
+
+  final _CSSRuleListImpl rules;
+
+  int addRule(String selector, String style, [int index = null]) native;
+
+  void deleteRule(int index) native;
+
+  int insertRule(String rule, int index) native;
+
+  void removeRule(int index) native;
+}