Revert of [inspector] Initial import of v8_inspector.

src/inspector/Atomics.h

-// Copyright 2016 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_INSPECTOR_ATOMICS_H_
-#define V8_INSPECTOR_ATOMICS_H_
-
-#include <stdint.h>
-
-#if defined(_MSC_VER)
-#include <windows.h>
-#endif
-
-namespace v8_inspector {
-
-#if defined(_MSC_VER)
-
-inline int atomicIncrement(int volatile* addend) { return InterlockedIncrement(reinterpret_cast<long volatile*>(addend)); }
-
-#else
-
-inline int atomicAdd(int volatile* addend, int increment) { return __sync_add_and_fetch(addend, increment); }
-inline int atomicIncrement(int volatile* addend) { return atomicAdd(addend, 1); }
-
-#endif
-
-} // namespace v8_inspector
-
-#endif // V8_INSPECTOR_ATOMICS_H_