[DevTools] Copy objects from debugger context to inspected context properly.

third_party/WebKit/Source/platform/v8_inspector/V8ValueCopier.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 V8ValueCopier_h
+#define V8ValueCopier_h
+
+#include <v8.h>
+
+namespace v8_inspector {
+
+v8::MaybeLocal<v8::Value> copyValueFromDebuggerContext(v8::Isolate*, v8::Local<v8::Context> debuggerContext, v8::Local<v8::Context> toContext, v8::Local<v8::Value>);
+
+} // namespace v8_inspector
+
+#endif // !defined(V8ValueCopier_h)