Add the Presentation API module and a single event target

Source/modules/presentation/Presentation.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 "modules/presentation/Presentation.h"
+
+namespace WebCore {
+
+Presentation::Presentation(ExecutionContext* context)
+    : ActiveDOMObject(context)
+{
+    ScriptWrappable::init(this);
+}
+
+Presentation::~Presentation()
+{
+}
+
+// static
+Presentation* Presentation::create(ExecutionContext* context)
+{
+    return new Presentation(context);
+}
+
+bool Presentation::displayAvailable() const
+{
+    return true;
+}
+
+void Presentation::trace(Visitor*)
+{
+}
+
+} // namespace WebCore