Gamepad API: add support for gamepadconnected and gamepaddisconnected events

Source/modules/gamepad/GamepadEvent.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 GamepadEvent_h
+#define GamepadEvent_h
+
+#include "core/events/Event.h"
+#include "modules/gamepad/Gamepad.h"
+
+namespace WebCore {
+
+struct GamepadEventInit : public EventInit {
+    GamepadEventInit();
+
+    RefPtrWillBeMember<Gamepad> gamepad;
+};
+
+class GamepadEvent FINAL : public Event {
+public:
+    static PassRefPtr<GamepadEvent> create()
+    {
+        return adoptRef(new GamepadEvent);
+    }
+    static PassRefPtr<GamepadEvent> create(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<Gamepad> gamepad)
+    {
+        return adoptRef(new GamepadEvent(type, canBubble, cancelable, gamepad));
+    }
+    static PassRefPtr<GamepadEvent> create(const AtomicString& type, const GamepadEventInit& initializer)
+    {
+        return adoptRef(new GamepadEvent(type, initializer));
+    }
+    virtual ~GamepadEvent();
+
+    Gamepad* gamepad() const { return m_gamepad.get(); }
+
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+
+    virtual void trace(Visitor*) OVERRIDE;
+
+private:
+    GamepadEvent();
+    GamepadEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<Gamepad>);
+    GamepadEvent(const AtomicString&, const GamepadEventInit&);
+
+    RefPtrWillBePersistent<Gamepad> m_gamepad;
+};
+
+} // namespace WebCore
+
+#endif // GamepadEvent_h