Mix in [TreeElementMixin] only on nodes that need it.

sdk/lib/_internal/compiler/implementation/closure.dart

Index: sdk/lib/_internal/compiler/implementation/closure.dart
diff --git a/sdk/lib/_internal/compiler/implementation/closure.dart b/sdk/lib/_internal/compiler/implementation/closure.dart
index 166136668d9cd862ce3e9fc1e48c8c947fb32720..2dd85eed8faad769aade9f61a90d983f6cda8557 100644
--- a/sdk/lib/_internal/compiler/implementation/closure.dart
+++ b/sdk/lib/_internal/compiler/implementation/closure.dart
@@ -1000,12 +1000,6 @@ class ClosureTranslator extends Visitor {
     });
   }
 
-  visitFunctionDeclaration(FunctionDeclaration node) {

[floitsch, 2014/07/25 12:30:08]

We need to declare the local in the current scope in case the declaration is
captured.

[Johnni Winther, 2014/08/04 06:59:09]

Reinserting though we don't need it. Fixing this issue in a later CL.

-    node.visitChildren(this);
-    LocalFunctionElement localFunction = elements[node];
-    declareLocal(localFunction);
-  }
-
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     bool oldInTryStatement = inTryStatement;