Roll Observatory deps (charted -> ^0.3.0)

packages/csslib/lib/src/analyzer.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of csslib.parser;
 
 // TODO(terry): Add optimizing phase to remove duplicated selectors in the same
 //              selector group (e.g., .btn, .btn { color: red; }).  Also, look
 //              at simplifying selectors expressions too (much harder).
 // TODO(terry): Detect invalid directive usage.  All @imports must occur before
@@ skipping 445 matching lines @@
 
   void visitIncludeDirective(IncludeDirective node) {
     if (map.containsKey(node.name)) {
       var mixinDef = map[node.name];
       if (mixinDef is MixinRulesetDirective) {
         _TopLevelIncludeReplacer.replace(
             _messages, _styleSheet, node, mixinDef.rulesets);
       } else if (currDef is MixinRulesetDirective && _anyRulesets(currDef)) {
         // currDef is MixinRulesetDirective
         MixinRulesetDirective mixinRuleset = currDef;
-        int index = mixinRuleset.rulesets.indexOf(node as dynamic);
-        mixinRuleset.rulesets.replaceRange(index, index + 1, [new NoOp()]);
+        int index = mixinRuleset.rulesets.indexOf(node);
+        mixinRuleset.rulesets.removeAt(index);
         _messages.warning(
             'Using declaration mixin ${node.name} as top-level mixin',
             node.span);
       }
     } else {
       if (currDef is MixinRulesetDirective) {
         MixinRulesetDirective rulesetDirect = currDef as MixinRulesetDirective;
-        var index = 0;
-        rulesetDirect.rulesets.forEach((entry) {
+        rulesetDirect.rulesets.removeWhere((entry) {
           if (entry == node) {
-            rulesetDirect.rulesets.replaceRange(index, index + 1, [new NoOp()]);
             _messages.warning('Undefined mixin ${node.name}', node.span);
+            return true;
           }
-          index++;
+          return false;
         });
       }
     }
     super.visitIncludeDirective(node);
   }
 
   void visitMixinRulesetDirective(MixinRulesetDirective node) {
     currDef = node;
 
     super.visitMixinRulesetDirective(node);
@@ skipping 514 matching lines @@
             isLastNone = false;
           }
         } else {
           isLastNone = simpleSeq.isCombinatorNone;
         }
       }
     }
     super.visitSelectorGroup(node);
   }
 }