[inspector] Initial import of v8_inspector.

src/inspector/public/StringBuffer.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_PUBLIC_STRINGBUFFER_H_
+#define V8_INSPECTOR_PUBLIC_STRINGBUFFER_H_
+
+#include "src/inspector/public/StringView.h"
+
+#include <memory>
+
+namespace v8_inspector {
+
+class PLATFORM_EXPORT StringBuffer {
+ public:
+  virtual ~StringBuffer() {}
+  virtual const StringView& string() = 0;
+  // This method copies contents.
+  static std::unique_ptr<StringBuffer> create(const StringView&);
+};
+
+}  // namespace v8_inspector
+
+#endif  // V8_INSPECTOR_PUBLIC_STRINGBUFFER_H_