[es6] Implement for-of iterator finalization

src/ast/prettyprinter.h

Index: src/ast/prettyprinter.h
diff --git a/src/ast/prettyprinter.h b/src/ast/prettyprinter.h
index 7e4dcdc804c3ddaca4724f563d73b07cf99baa0d..0186203d27d99a702d22e7ec26d7fb3333b0d2fa 100644
--- a/src/ast/prettyprinter.h
+++ b/src/ast/prettyprinter.h
@@ -104,6 +104,9 @@ class AstPrinter: public PrettyPrinter {
 
   const char* PrintProgram(FunctionLiteral* program);
 
+  // Print a node to stdout.
+  static void PrintOut(Isolate* isolate, AstNode* node);
+
   // Individual nodes
 #define DECLARE_VISIT(type) virtual void Visit##type(type* node);
   AST_NODE_LIST(DECLARE_VISIT)