Update charted to 0.4.8 and roll

packages/csslib/lib/visitor.dart

Index: packages/csslib/lib/visitor.dart
diff --git a/packages/csslib/lib/visitor.dart b/packages/csslib/lib/visitor.dart
index b6babbdf5c80ab7dee56352a8af895fd6abc179d..eff9e7b6ccc4b4ab58620be29ce24c0af003d9ce 100644
--- a/packages/csslib/lib/visitor.dart
+++ b/packages/csslib/lib/visitor.dart
@@ -20,6 +20,13 @@ abstract class VisitorBase {
   visitNoOp(NoOp node);
   visitTopLevelProduction(TopLevelProduction node);
   visitDirective(Directive node);
+  visitDocumentDirective(DocumentDirective node);
+  visitSupportsDirective(SupportsDirective node);
+  visitSupportsConditionInParens(SupportsConditionInParens node);
+  visitSupportsNegation(SupportsNegation node);
+  visitSupportsConjunction(SupportsConjunction node);
+  visitSupportsDisjunction(SupportsDisjunction node);
+  visitViewportDirective(ViewportDirective node);
   visitMediaExpression(MediaExpression node);
   visitMediaQuery(MediaQuery node);
   visitMediaDirective(MediaDirective node);
@@ -152,6 +159,36 @@ class Visitor implements VisitorBase {
     }
   }
 
+  visitDocumentDirective(DocumentDirective node) {
+    _visitNodeList(node.functions);
+    _visitNodeList(node.groupRuleBody);
+  }
+
+  visitSupportsDirective(SupportsDirective node) {
+    node.condition.visit(this);
+    _visitNodeList(node.groupRuleBody);
+  }
+
+  visitSupportsConditionInParens(SupportsConditionInParens node) {
+    node.condition.visit(this);
+  }
+
+  visitSupportsNegation(SupportsNegation node) {
+    node.condition.visit(this);
+  }
+
+  visitSupportsConjunction(SupportsConjunction node) {
+    _visitNodeList(node.conditions);
+  }
+
+  visitSupportsDisjunction(SupportsDisjunction node) {
+    _visitNodeList(node.conditions);
+  }
+
+  visitViewportDirective(ViewportDirective node) {
+    node.declarations.visit(this);
+  }
+
   visitMediaDirective(MediaDirective node) {
     for (var mediaQuery in node.mediaQueries) {
       visitMediaQuery(mediaQuery);
@@ -302,8 +339,7 @@ class Visitor implements VisitorBase {
   visitPseudoElementFunctionSelector(PseudoElementFunctionSelector node) =>
       visitSimpleSelector(node);
 
-  visitNegationSelector(NegationSelector node) =>
-      visitSimpleSelector(node);
+  visitNegationSelector(NegationSelector node) => visitSimpleSelector(node);
 
   visitSelectorExpression(SelectorExpression node) {
     _visitNodeList(node.expressions);