Added non-prefixed navigator.getGamepads() with updated API

Source/modules/gamepad/WebKitGamepad.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 WebKitGamepad_h
+#define WebKitGamepad_h
+
+#include "modules/gamepad/GamepadBase.h"
+
+namespace WebCore {
+
+class WebKitGamepad FINAL: public GamepadBase {
+public:
+    static PassRefPtrWillBeRawPtr<WebKitGamepad> create()
+    {
+        return adoptRefWillBeNoop(new WebKitGamepad);
+    }
+    virtual ~WebKitGamepad();
+
+    const FloatVector& buttons() const { return m_buttons; }
+    virtual void buttons(unsigned count, const blink::WebGamepadButton* data);
+
+private:
+    WebKitGamepad();
+    FloatVector m_buttons;
+};
+
+} // namespace WebCore
+
+#endif // WebKitGamepad_h