[Bindings] Create and use V8 context snapshots

third_party/WebKit/public/web/SnapshotCreator.h

+// Copyright 2017 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 SnapshotCreator_h
+#define SnapshotCreator_h
+
+#include <cstdint>
+#include "public/platform/WebCommon.h"
+#include "v8/include/v8.h"
+
+namespace blink {
+
+class BLINK_EXPORT SnapshotCreator {
+ public:
+  // static intptr_t* getExternalReferences();
+  static void TakeSnapshot(v8::SnapshotCreator*, int worldId);
+  static v8::StartupData SetUpSnapshotCreator(v8::SnapshotCreator*);
+  static v8::SnapshotCreator* GetSnapshotCreator();
+  static v8::StartupData Serialize(v8::Local<v8::Object>, int index, void*);
+  static void SetTakingSnapshot(bool);
+};
+
+}  // namespace blink
+
+#endif  // SnapshotCreator_h