[runtime] Remove receiver==holder check in IntegerIndexedExotic lookup

src/lookup.h

 // Copyright 2014 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_LOOKUP_H_
 #define V8_LOOKUP_H_
 
 #include "src/factory.h"
 #include "src/isolate.h"
 #include "src/objects.h"
@@ skipping 297 matching lines @@
 
   static Handle<JSReceiver> GetRootForNonJSReceiver(
       Isolate* isolate, Handle<Object> receiver, uint32_t index = kMaxUInt32);
   inline static Handle<JSReceiver> GetRoot(Isolate* isolate,
                                            Handle<Object> receiver,
                                            uint32_t index = kMaxUInt32) {
     if (receiver->IsJSReceiver()) return Handle<JSReceiver>::cast(receiver);
     return GetRootForNonJSReceiver(isolate, receiver, index);
   }
 
-  inline bool IsIntegerIndexedExotic(JSReceiver* holder);
+  State NotFound(JSReceiver* const holder) const;
 
   // If configuration_ becomes mutable, update
   // HolderIsReceiverOrHiddenPrototype.
   const Configuration configuration_;
   State state_;
   bool has_property_;
   InterceptorState interceptor_state_;
   PropertyDetails property_details_;
   Isolate* const isolate_;
   Handle<Name> name_;
   uint32_t index_;
   Handle<Object> transition_;
   const Handle<Object> receiver_;
   Handle<JSReceiver> holder_;
   Handle<Map> holder_map_;
   const Handle<JSReceiver> initial_holder_;
   uint32_t number_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_LOOKUP_H_