Add the Presentation API module and a single event target

Source/modules/presentation/NavigatorPresentation.h

+// 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.
+
+#ifndef NavigatorPresentation_h
+#define NavigatorPresentation_h
+
+#include "core/frame/DOMWindowProperty.h"
+#include "platform/Supplementable.h"
+
+namespace blink {
+
+class Navigator;
+class Presentation;
+
+class NavigatorPresentation FINAL

[eseidel, 2014/08/19 18:20:58]

Few classes in Blink have ever achieved this level of multi-inheritance.  You
deserve an award.

[whywhat, 2014/08/20 16:40:42]

Acknowledged.

Not sure if it's a compliment or what? :)

+    : public NoBaseWillBeGarbageCollectedFinalized<NavigatorPresentation>
+    , public WillBeHeapSupplement<Navigator>
+    , public DOMWindowProperty {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NavigatorPresentation);
+public:
+    virtual ~NavigatorPresentation();
+
+    static NavigatorPresentation& from(Navigator&);
+    static Presentation& presentation(Navigator&);
+
+    virtual void trace(Visitor*) OVERRIDE;
+
+private:
+    static const char* supplementName();
+
+    explicit NavigatorPresentation(LocalFrame*);
+
+    Presentation& presentation();
+
+    PersistentWillBeMember<Presentation> m_presentation;
+};
+
+} // namespace blink
+
+#endif // NavigatorPresentation_h