Add IsStackAllocated helper for variables.

src/variables.h

 // Copyright 2006-2008 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 128 matching lines @@
   bool is_accessed_from_inner_scope() const  {
     return is_accessed_from_inner_scope_;
   }
   bool is_used() { return is_used_; }
   void set_is_used(bool flag) { is_used_ = flag; }
 
   bool IsVariable(Handle<String> n) const {
     return !is_this() && name().is_identical_to(n);
   }
 
+  bool IsStackAllocated() const;
+
   bool is_dynamic() const {
     return (mode_ == DYNAMIC ||
             mode_ == DYNAMIC_GLOBAL ||
             mode_ == DYNAMIC_LOCAL);
   }
 
   bool is_global() const;
   bool is_this() const { return kind_ == THIS; }
   bool is_arguments() const { return kind_ == ARGUMENTS; }
 
@@ skipping 37 matching lines @@
   // rewrite_ is usually a Slot or a Property, but may be any expression.
   Expression* rewrite_;
 
   friend class Scope;  // Has explicit access to rewrite_.
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_VARIABLES_H_