Add FunctionDeclaration node.

frog/leg/ssa/closure.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.
 
 class ClosureFieldElement extends Element {
   ClosureFieldElement(SourceString name, ClassElement enclosing)
       : super(name, ElementKind.FIELD, enclosing);
 
   bool isInstanceMember() => true;
   bool isAssignable() => false;
@@ skipping 378 matching lines @@
         savedClosureData.freeVariableMapping.getKeys();
     assert(freeVariables.isEmpty() || savedInsideClosure);
     for (Element freeElement in freeVariables) {
       assert(capturedVariableMapping[freeElement] == null ||
              capturedVariableMapping[freeElement] == freeElement);
       capturedVariableMapping[freeElement] = freeElement;
       useLocal(freeElement);
     }
   }
 
+  visitFunctionDeclaration(FunctionDeclaration node) {
+    node.visitChildren(this);
+    declareLocal(elements[node]);
+  }
+
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
     inTryCatchOrFinally = true;
     node.visitChildren(this);
     inTryCatchOrFinally = false;
   }
 }