Revert of [inspector] Initial import of v8_inspector.

src/inspector/public/V8StackTrace.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_V8STACKTRACE_H_
-#define V8_INSPECTOR_PUBLIC_V8STACKTRACE_H_
-
-#include "src/inspector/public/StringBuffer.h"
-#include "src/inspector/public/StringView.h"
-#include "src/inspector/public/protocol/Runtime.h"
-
-namespace v8_inspector {
-
-class V8StackTrace {
-public:
-    virtual bool isEmpty() const = 0;
-    virtual StringView topSourceURL() const = 0;
-    virtual int topLineNumber() const = 0;
-    virtual int topColumnNumber() const = 0;
-    virtual StringView topScriptId() const = 0;
-    virtual StringView topFunctionName() const = 0;
-
-    virtual ~V8StackTrace() { }
-    virtual std::unique_ptr<protocol::Runtime::API::StackTrace> buildInspectorObject() const = 0;
-    virtual std::unique_ptr<StringBuffer> toString() const = 0;
-
-    // Safe to pass between threads, drops async chain.
-    virtual std::unique_ptr<V8StackTrace> clone() = 0;
-};
-
-} // namespace v8_inspector
-
-#endif // V8_INSPECTOR_PUBLIC_V8STACKTRACE_H_