[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/bindings/modules/v8/V8ContextSnapshotExternalReferences.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 V8ContextSnapshotExternalReferences_h
+#define V8ContextSnapshotExternalReferences_h
+
+#include <cstdint>
+
+#include "modules/ModulesExport.h"
+#include "platform/wtf/Allocator.h"
+
+namespace blink {
+
+// V8ContextSnapshotExternalReferences::GetTable() provides a table of pointers
+// of C++ callbacks exposed to V8. The table contains C++ callbacks for DOM
+// attribute getters, setters, DOM methods, wrapper type info etc.
+class MODULES_EXPORT V8ContextSnapshotExternalReferences {
+  STATIC_ONLY(V8ContextSnapshotExternalReferences);
+
+ public:
+  // The definition of this method is auto-generated in
+  // V8ContextSnapshotExternalReferences.cpp.
+  static intptr_t* GetTable();
+};
+
+}  // namespace blink
+
+#endif  // V8ContextSnapshotExternalReferences_h