[Arguments] Remove the arguments shadow symbol.

src/scopeinfo.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 94 matching lines @@
  public :
 
   static SerializedScopeInfo* cast(Object* object) {
     ASSERT(object->IsFixedArray());
     return reinterpret_cast<SerializedScopeInfo*>(object);
   }
 
   // Does this scope call eval?
   bool CallsEval();
 
-  // Does this scope have an arguments shadow?
-  bool HasArgumentsShadow() {
-    return StackSlotIndex(Heap::arguments_shadow_symbol()) >= 0;
-  }
-
   // Return the number of stack slots for code.
   int NumberOfStackSlots();
 
   // Return the number of context slots for code.
   int NumberOfContextSlots();
 
   // Return if this has context slots besides MIN_CONTEXT_SLOTS;
   bool HasHeapAllocatedLocals();
 
   // Lookup support for serialized scope info. Returns the
@@ skipping 99 matching lines @@
   };
 
   static Key keys_[kLength];
   static uint32_t values_[kLength];
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPEINFO_H_