Revert of Re-land FastAccessorBuilder.

include/v8-experimental.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.
-
-/**
- * This header contains a set of experimental V8 APIs. We hope these will
- * become a part of standard V8, but they may also be removed if we deem the
- * experiment to not be successul.
- */
-#ifndef V8_INCLUDE_V8_EXPERIMENTAL_H_
-#define V8_INCLUDE_V8_EXPERIMENTAL_H_
-
-#include "include/v8.h"
-
-namespace v8 {
-namespace experimental {
-
-// Allow the embedder to construct accessors that V8 can compile and use
-// directly, without jumping into the runtime.
-class V8_EXPORT FastAccessorBuilder {
- public:
-  struct ValueId {
-    size_t value_id;
-  };
-  struct LabelId {
-    size_t label_id;
-  };
-
-  static FastAccessorBuilder* New(Isolate* isolate);
-
-  ValueId IntegerConstant(int int_constant);
-  ValueId GetReceiver();
-  ValueId LoadInternalField(ValueId value_id, int field_no);
-  ValueId LoadValue(ValueId value_id, int offset);
-  ValueId LoadObject(ValueId value_id, int offset);
-  void ReturnValue(ValueId value_id);
-  void CheckFlagSetOrReturnNull(ValueId value_id, int mask);
-  void CheckNotZeroOrReturnNull(ValueId value_id);
-  LabelId MakeLabel();
-  void SetLabel(LabelId label_id);
-  void CheckNotZeroOrJump(ValueId value_id, LabelId label_id);
-
- private:
-  FastAccessorBuilder() = delete;
-  FastAccessorBuilder(const FastAccessorBuilder&) = delete;
-  ~FastAccessorBuilder() = delete;
-  void operator=(const FastAccessorBuilder&) = delete;
-};
-
-}  // namespace experimental
-}  // namespace v8
-
-#endif  // V8_INCLUDE_V8_EXPERIMENTAL_H_