Implement Symbol correctly in dart2js.

dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart b/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
index ea348f71dfc4f73529f7d843c12eb66ba32f06be..b608a2f5a05d9342d80778900e9bc9dcb1ec9f72 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/ssa/builder.dart
@@ -3342,6 +3342,15 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
     }
     FunctionElement functionElement = constructor;
     constructor = functionElement.redirectionTarget;
+    final bool isSymbolConstructor =
+        functionElement == compiler.symbolConstructor;
+
+    if (isSymbolConstructor) {
+      // TODO(ahe): Don't simply use head.
+      constructor = constructor.getEnclosingClass().constructors.head;

[ahe, 2013/04/18 11:34:44]

Will fix before submitting.

+      selector = new Selector.call(const SourceString('validate'), null, 1);
+    }
+
     // TODO(5346): Try to avoid the need for calling [declaration] before
     // creating an [HStatic].
     HInstruction target = new HStatic(constructor.declaration);