[DevTools] Added public method for async execution of scripts

Source/web/WebScriptSource.cpp

+// Copyright 2014 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.
+
+#include "config.h"
+#include "public/web/WebScriptSource.h"
+
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "wtf/text/TextPosition.h"
+
+namespace blink {
+
+WebScriptSource::operator ScriptSourceCode() const
+{
+    TextPosition position(OrdinalNumber::fromOneBasedInt(startLine), OrdinalNumber::first());
+    return ScriptSourceCode(code, url, position);
+}
+
+} // namespace blink