bindings: Retires ScriptWrappable::init, etc.

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()
 {
-    ScriptWrappable::init(this);
 }
 
 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