[es6] Implement for-of iterator finalization

src/ast/prettyprinter.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_PRETTYPRINTER_H_
 #define V8_AST_PRETTYPRINTER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 
@@ skipping 86 matching lines @@
 
 
 // Prints the AST structure
 class AstPrinter: public PrettyPrinter {
  public:
   explicit AstPrinter(Isolate* isolate);
   virtual ~AstPrinter();
 
   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)
 #undef DECLARE_VISIT
 
  private:
   friend class IndentedScope;
   void PrintIndented(const char* txt);
   void PrintIndentedVisit(const char* s, AstNode* node);
 
@@ skipping 14 matching lines @@
 
   int indent_;
 };
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_PRETTYPRINTER_H_