Refactor the API for setting dynamic resource load priorities

Source/core/layout/LayoutImage.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple 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
@@ skipping 61 matching lines @@
 protected:
     bool needsPreferredWidthsRecalculation() const final;
     LayoutBox* embeddedContentBox() const final;
     void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const final;
 
     void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override;
 
     void paint(const PaintInfo&, const LayoutPoint&) final;
 
     void layout() override;
-    bool updateImageLoadingPriorities() final;
 
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectLayoutImage || LayoutReplaced::isOfType(type); }
 
     void willBeDestroyed() override;
 
     void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
 
 private:
     bool isImage() const override { return true; }
 
@@ skipping 21 matching lines @@
     bool m_didIncrementVisuallyNonEmptyPixelCount;
     bool m_isGeneratedContent;
     float m_imageDevicePixelRatio;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutImage, isLayoutImage());
 
 } // namespace blink
 
 #endif // LayoutImage_h