Support globals in frog isolates.

frog/value.dart

 // Copyright (c) 2011, 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.
 
 /**
  * Represents a meta-value for code generation.
  */
 class Value {
   /** The [Type] of the [Value]. */
   Type type;
@@ skipping 626 matching lines @@
     var name = "const\$$uniqueId";
     var codeWithComment = "$name/*${exp.span.text}*/";
     return new GlobalValue(
         exp.type, codeWithComment, true, null, name, exp, name,
         exp.span,
         dependencies.filter((d) => d is GlobalValue));
   }
 
   GlobalValue(Type type, String code, bool isConst,
       this.field, this.name, this.exp, this.canonicalCode,
-      SourceSpan span, this.dependencies)
-      : super(type, code, span, !isConst);
+      SourceSpan span, List<GlobalValue> _dependencies)
+      : super(type, code, span, !isConst), dependencies = [] {
+    // store transitive-dependencies so sorting algorithm works correctly.
+    for (final dep in _dependencies) {
+      dependencies.add(dep);
+      dependencies.addAll(dep.dependencies);
+    }
+  }
 
   int compareTo(GlobalValue other) {
     // order by dependencies, o.w. by name
     if (other == this) {
       return 0;
     } else if (dependencies.indexOf(other, 0) >= 0) {
       return 1;
     } else if (other.dependencies.indexOf(this, 0) >= 0) {
       return -1;
     } else if (dependencies.length > other.dependencies.length) {
@@ skipping 43 matching lines @@
 
     // Then look for members in my library.
     member = home.library.lookup(name, span);
     if (member != null) {
       return member;
     }
 
     return null;
   }
 }