Use entry rather than index in ElementsAccessor::Get

src/elements.h

 // Copyright 2012 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_ELEMENTS_H_
 #define V8_ELEMENTS_H_
 
 #include "src/elements-kind.h"
 #include "src/heap/heap.h"
 #include "src/isolate.h"
@@ skipping 20 matching lines @@
   // in the backing store to use for the check, which must be compatible with
   // the ElementsKind of the ElementsAccessor. If backing_store is NULL, the
   // holder->elements() is used as the backing store.
   virtual bool HasElement(Handle<JSObject> holder, uint32_t index,
                           Handle<FixedArrayBase> backing_store) = 0;
 
   inline bool HasElement(Handle<JSObject> holder, uint32_t index) {
     return HasElement(holder, index, handle(holder->elements()));
   }
 
-  // Returns the element with the specified index or undefined if there is no
-  // such element. This method doesn't iterate up the prototype chain.  The
-  // caller can optionally pass in the backing store to use for the check, which
-  // must be compatible with the ElementsKind of the ElementsAccessor. If
-  // backing_store is NULL, the holder->elements() is used as the backing store.
-  virtual Handle<Object> Get(Handle<JSObject> holder, uint32_t index,
-                             Handle<FixedArrayBase> backing_store) = 0;
-
-  inline Handle<Object> Get(Handle<JSObject> holder, uint32_t index) {
-    return Get(holder, index, handle(holder->elements()));
-  }
+  virtual Handle<Object> Get(Handle<FixedArrayBase> backing_store,
+                             uint32_t entry) = 0;
 
   // Modifies the length data property as specified for JSArrays and resizes the
   // underlying backing store accordingly. The method honors the semantics of
   // changing array sizes as defined in EcmaScript 5.1 15.4.5.2, i.e. array that
   // have non-deletable elements can only be shrunk to the size of highest
   // element that is non-deletable.
   virtual void SetLength(Handle<JSArray> holder, uint32_t new_length) = 0;
 
   // Deletes an element in an object.
   virtual void Delete(Handle<JSObject> holder, uint32_t entry) = 0;
@@ skipping 99 matching lines @@
 void CheckArrayAbuse(Handle<JSObject> obj, const char* op, uint32_t index,
                      bool allow_appending = false);
 
 MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements(
     Handle<JSArray> array,
     Arguments* args);
 
 } }  // namespace v8::internal
 
 #endif  // V8_ELEMENTS_H_