[DevTools] Switch from platform/v8_inspector to v8/v8-inspector.h.

third_party/WebKit/Source/platform/v8_inspector/V8InternalValueType.h

-// Copyright 2016 The Chromium 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 V8InternalValueType_h
-#define V8InternalValueType_h
-
-#include <v8.h>
-
-namespace v8_inspector {
-
-enum class V8InternalValueType { kEntry, kLocation, kScope, kScopeList };
-
-bool markAsInternal(v8::Local<v8::Context>, v8::Local<v8::Object>, V8InternalValueType);
-bool markArrayEntriesAsInternal(v8::Local<v8::Context>, v8::Local<v8::Array>, V8InternalValueType);
-v8::Local<v8::Value> v8InternalValueTypeFrom(v8::Local<v8::Context>, v8::Local<v8::Object>);
-
-
-} // namespace v8_inspector
-
-#endif // V8InternalValueType_h