Revert r12990 and r12991 from trunk.

src/objects-inl.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 5015 matching lines @@
 
 bool JSReceiver::HasLocalProperty(String* name) {
   if (IsJSProxy()) {
     return JSProxy::cast(this)->HasPropertyWithHandler(name);
   }
   return GetLocalPropertyAttribute(name) != ABSENT;
 }
 
 
 PropertyAttributes JSReceiver::GetPropertyAttribute(String* key) {
-  uint32_t index;
-  if (IsJSObject() && key->AsArrayIndex(&index)) {
-    return GetElementAttribute(index);
-  }
   return GetPropertyAttributeWithReceiver(this, key);
 }
 
 
 PropertyAttributes JSReceiver::GetElementAttribute(uint32_t index) {
   if (IsJSProxy()) {
     return JSProxy::cast(this)->GetElementAttributeWithHandler(this, index);
   }
   return JSObject::cast(this)->GetElementAttributeWithReceiver(
       this, index, true);
@@ skipping 495 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_