Revert of [key-accumulator] Starting to reimplement the key-accumulator

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"
-#include "src/keys.h"
+#include "src/key-accumulator.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 // Abstract base class for handles that can operate on objects with differing
 // ElementsKinds.
 class ElementsAccessor {
  public:
   explicit ElementsAccessor(const char* name) : name_(name) { }
@@ skipping 70 matching lines @@
 
   inline void CollectElementIndices(Handle<JSObject> object,
                                     KeyAccumulator* keys,
                                     uint32_t range = kMaxUInt32,
                                     PropertyFilter filter = ALL_PROPERTIES,
                                     uint32_t offset = 0) {
     CollectElementIndices(object, handle(object->elements()), keys, range,
                           filter, offset);
   }
 
-  //
-  virtual Handle<FixedArray> PrependElementIndices(
-      Handle<JSObject> object, Handle<FixedArrayBase> backing_store,
-      Handle<FixedArray> keys, GetKeysConversion convert,
-      PropertyFilter filter = ALL_PROPERTIES) = 0;
-
-  inline Handle<FixedArray> PrependElementIndices(
-      Handle<JSObject> object, Handle<FixedArray> keys,
-      GetKeysConversion convert, PropertyFilter filter = ALL_PROPERTIES) {
-    return PrependElementIndices(object, handle(object->elements()), keys,
-                                 convert, filter);
-  }
-
   virtual void AddElementsToKeyAccumulator(Handle<JSObject> receiver,
                                            KeyAccumulator* accumulator,
                                            AddKeyConversion convert) = 0;
 
   virtual void GrowCapacityAndConvert(Handle<JSObject> object,
                                       uint32_t capacity) = 0;
 
   static void InitializeOncePerProcess();
   static void TearDown();
 
@@ skipping 71 matching lines @@
                      bool allow_appending = false);
 
 MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements(
     Handle<JSArray> array,
     Arguments* args);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ELEMENTS_H_