[Presentation API] Added the DefaultPresentationStart event and parsing of the default presentation…

Source/modules/presentation/DefaultSessionStartEvent.h

Index: Source/modules/presentation/DefaultSessionStartEvent.h
diff --git a/Source/modules/presentation/DefaultSessionStartEvent.h b/Source/modules/presentation/DefaultSessionStartEvent.h
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index 0000000000000000000000000000000000000000..61f3d82a184ef0a530a6d1aaac41c9ed146d067e
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+++ b/Source/modules/presentation/DefaultSessionStartEvent.h
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+// Copyright 2015 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 DefaultSessionStartEvent_h
+#define DefaultSessionStartEvent_h
+
+#include "modules/EventModules.h"
+#include "modules/presentation/PresentationSession.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class DefaultSessionStartEventInit;
+
+// Presentation API event to be fired when a presentation has been triggered
+// by the embedder using the default presentation URL and id.
+// See https://code.google.com/p/chromium/issues/detail?id=459001 for details.
+class DefaultSessionStartEvent final : public Event {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    virtual ~DefaultSessionStartEvent();
+
+    static PassRefPtrWillBeRawPtr<DefaultSessionStartEvent> create()
+    {
+        return adoptRefWillBeNoop(new DefaultSessionStartEvent);
+    }
+    static PassRefPtrWillBeRawPtr<DefaultSessionStartEvent> create(const AtomicString& eventType, PresentationSession* session)
+    {
+        return adoptRefWillBeNoop(new DefaultSessionStartEvent(eventType, session));
+    }
+    static PassRefPtrWillBeRawPtr<DefaultSessionStartEvent> create(const AtomicString& eventType, const DefaultSessionStartEventInit& initializer)
+    {
+        return adoptRefWillBeNoop(new DefaultSessionStartEvent(eventType, initializer));
+    }
+
+    PresentationSession* session() { return m_session.get(); }
+
+    virtual const AtomicString& interfaceName() const override;
+
+private:
+    DefaultSessionStartEvent();
+    DefaultSessionStartEvent(const AtomicString& eventType, PresentationSession*);
+    DefaultSessionStartEvent(const AtomicString& eventType, const DefaultSessionStartEventInit& initializer);
+
+    Persistent<PresentationSession> m_session;
+};
+
+DEFINE_TYPE_CASTS(DefaultSessionStartEvent, Event, event, event->interfaceName() == EventNames::DefaultSessionStartEvent, event.interfaceName() == EventNames::DefaultSessionStartEvent);
+
+} // namespace blink
+
+#endif // DefaultSessionStartEvent_h