Removed deprecated navigator.webkitGetGamepads.

Source/modules/gamepad/WebKitGamepad.cpp

-// 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.
-
-#include "config.h"
-#include "modules/gamepad/WebKitGamepad.h"
-
-namespace blink {
-
-WebKitGamepad::WebKitGamepad()
-{
-}
-
-WebKitGamepad::~WebKitGamepad()
-{
-}
-
-void WebKitGamepad::setButtons(unsigned count, const WebGamepadButton* data)
-{
-    m_buttons.resize(count);
-    for (unsigned i = 0; i < count; ++i)
-        m_buttons[i] = data[i].value;
-}
-
-} // namespace blink