[turbofan] Remove unnecessary prototype checks for element access.

src/compiler/access-info.h

 // Copyright 2015 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_COMPILER_ACCESS_INFO_H_
 #define V8_COMPILER_ACCESS_INFO_H_
 
 #include <iosfwd>
 
 #include "src/field-index.h"
@@ skipping 17 matching lines @@
 
 typedef std::vector<Handle<Map>> MapList;
 
 // Mapping of transition source to transition target.
 typedef std::vector<std::pair<Handle<Map>, Handle<Map>>> MapTransitionList;
 
 // This class encapsulates all information required to access a certain element.
 class ElementAccessInfo final {
  public:
   ElementAccessInfo();
-  ElementAccessInfo(MapList const& receiver_maps, ElementsKind elements_kind,
-                    MaybeHandle<JSObject> holder);
+  ElementAccessInfo(MapList const& receiver_maps, ElementsKind elements_kind);
 
-  MaybeHandle<JSObject> holder() const { return holder_; }
   ElementsKind elements_kind() const { return elements_kind_; }
   MapList const& receiver_maps() const { return receiver_maps_; }
   MapTransitionList& transitions() { return transitions_; }
   MapTransitionList const& transitions() const { return transitions_; }
 
  private:
   ElementsKind elements_kind_;
-  MaybeHandle<JSObject> holder_;
   MapList receiver_maps_;
   MapTransitionList transitions_;
 };
 
 // This class encapsulates all information required to access a certain
 // object property, either on the object itself or on the prototype chain.
 class PropertyAccessInfo final {
  public:
   enum Kind {
     kInvalid,
@@ skipping 92 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(AccessInfoFactory);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ACCESS_INFO_H_