[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/core/html/HTMLImageElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 69 matching lines @@
         visitor->trace(m_element);
         MediaQueryListListener::trace(visitor);
     }
 private:
     explicit ViewportChangeListener(HTMLImageElement* element) : m_element(element) { }
     RawPtrWillBeMember<HTMLImageElement> m_element;
 };
 
 HTMLImageElement::HTMLImageElement(Document& document, HTMLFormElement* form, bool createdByParser)
     : HTMLElement(imgTag, document)
+    , ActiveScriptWrappable(this)
     , m_imageLoader(HTMLImageLoader::create(this))
     , m_imageDevicePixelRatio(1.0f)
     , m_source(nullptr)
     , m_formWasSetByParser(false)
     , m_elementCreatedByParser(createdByParser)
     , m_useFallbackContent(false)
     , m_isFallbackImage(false)
     , m_referrerPolicy(ReferrerPolicyDefault)
 {
     setHasCustomStyleCallbacks();
@@ skipping 735 matching lines @@
 {
     ImageResource* image = cachedImage();
     if (!image)
         return IntSize();
     LayoutSize lSize = image->imageSize(LayoutObject::shouldRespectImageOrientation(layoutObject()), 1.0f);
     ASSERT(lSize.fraction().isZero());
     return IntSize(lSize.width(), lSize.height());
 }
 
 } // namespace blink