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

Source/modules/gamepad/GamepadList.h

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 11 matching lines @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  * DAMAGE.
  */
 
 #ifndef GamepadList_h
 #define GamepadList_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "heap/Handle.h"
 #include "modules/gamepad/Gamepad.h"
+#include "public/platform/WebGamepads.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class GamepadList : public RefCountedWillBeGarbageCollectedFinalized<GamepadList>, public ScriptWrappable {
 public:
     static PassRefPtrWillBeRawPtr<GamepadList> create() { return adoptRefWillBeNoop(new GamepadList); }
     ~GamepadList();
 
     void set(unsigned index, PassRefPtrWillBeRawPtr<Gamepad>);
     Gamepad* item(unsigned index);
     unsigned length() const;
 
     void trace(Visitor*);
 
 private:
-    enum { kMaximumGamepads = 4 };
     GamepadList()
     {
         ScriptWrappable::init(this);
     }
 
-    RefPtrWillBeMember<Gamepad> m_items[kMaximumGamepads];
+    RefPtrWillBeMember<Gamepad> m_items[blink::WebGamepads::itemsLengthCap];
 };
 
 } // namespace WebCore
 
 #endif // GamepadList_h