Removed fixed dependencies

packages/csslib/lib/src/css_printer.dart

Index: packages/csslib/lib/src/css_printer.dart
diff --git a/packages/csslib/lib/src/css_printer.dart b/packages/csslib/lib/src/css_printer.dart
index ac26acb2bf851780b6313e2706b1122ab648e879..91c28612df6dd9379bae23839205afe200458b29 100644
--- a/packages/csslib/lib/src/css_printer.dart
+++ b/packages/csslib/lib/src/css_printer.dart
@@ -141,7 +141,7 @@ class CssPrinter extends Visitor {
     emit('$_newLine@media');
     emitMediaQueries(node.mediaQueries);
     emit('$_sp{');
-    for (var ruleset in node.rulesets) {
+    for (var ruleset in node.rules) {
       ruleset.visit(this);
     }
     emit('$_newLine}');
@@ -149,7 +149,7 @@ class CssPrinter extends Visitor {
 
   void visitHostDirective(HostDirective node) {
     emit('$_newLine@host$_sp{');
-    for (var ruleset in node.rulesets) {
+    for (var ruleset in node.rules) {
       ruleset.visit(this);
     }
     emit('$_newLine}');