Add for-of Crankshaft support

src/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 961 matching lines @@
   Expression* result_done() const {
     return result_done_;
   }
 
   // each = result.value
   Expression* assign_each() const {
     return assign_each_;
   }
 
   virtual BailoutId ContinueId() const { return EntryId(); }
-  virtual BailoutId StackCheckId() const { return BackEdgeId(); }
+  virtual BailoutId StackCheckId() const { return BodyId(); }
 
-  BailoutId BackEdgeId() const { return back_edge_id_; }
+  BailoutId BodyId() const { return body_id_; }
 
  protected:
   ForOfStatement(Isolate* isolate, ZoneStringList* labels)
       : ForEachStatement(isolate, labels),
         assign_iterator_(NULL),
         next_result_(NULL),
         result_done_(NULL),
         assign_each_(NULL),
-        back_edge_id_(GetNextId(isolate)) {
+        body_id_(GetNextId(isolate)) {
   }
 
   Expression* assign_iterator_;
   Expression* next_result_;
   Expression* result_done_;
   Expression* assign_each_;
-  const BailoutId back_edge_id_;
+  const BailoutId body_id_;
 };
 
 
 class ExpressionStatement: public Statement {
  public:
   DECLARE_NODE_TYPE(ExpressionStatement)
 
   void set_expression(Expression* e) { expression_ = e; }
   Expression* expression() const { return expression_; }
 
@@ skipping 2215 matching lines @@
  private:
   Isolate* isolate_;
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_