Consolidate background fill layer opaqueness into one method

third_party/WebKit/Source/core/style/FillLayer.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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 157 matching lines @@
         return m_next ? m_next->hasImage() : false;
     }
 
     bool hasFixedImage() const
     {
         if (m_image && m_attachment == FixedBackgroundAttachment)
             return true;
         return m_next ? m_next->hasFixedImage() : false;
     }
 
-    bool hasOpaqueImage(const LayoutObject*) const;
+    bool imageOccludesNextLayers(const LayoutObject&) const;

[Stephen Chennney, 2016/03/16 20:54:16]

Renamed to match the clipOccludesNextLayers method.

     bool hasRepeatXY() const;
     bool clipOccludesNextLayers() const;
 
     EFillLayerType type() const { return static_cast<EFillLayerType>(m_type); }
 
     void fillUnsetProperties();
     void cullEmptyLayers();
 
     static bool imagesIdentical(const FillLayer*, const FillLayer*);
 
@@ skipping 15 matching lines @@
     static Length initialFillXPosition(EFillLayerType) { return Length(0.0, Percent); }
     static Length initialFillYPosition(EFillLayerType) { return Length(0.0, Percent); }
     static StyleImage* initialFillImage(EFillLayerType) { return 0; }
     static EMaskSourceType initialFillMaskSourceType(EFillLayerType) { return MaskAlpha; }
 
 private:
     friend class ComputedStyle;
 
     FillLayer() { }
 
+    bool imageIsOpaqueAndTilesLayer(const LayoutObject&) const;
+
     FillLayer* m_next;
 
     RefPtrWillBePersistent<StyleImage> m_image;
 
     Length m_xPosition;
     Length m_yPosition;
 
     LengthSize m_sizeLength;
 
     unsigned m_attachment : 2; // EFillAttachment
@@ skipping 26 matching lines @@
 
     mutable unsigned m_thisOrNextLayersClipMax : 2; // EFillBox, maximum m_clip value from this to bottom layer
     mutable unsigned m_thisOrNextLayersUseContentBox : 1; // True if any of this or subsequent layers has content-box clip or origin.
     mutable unsigned m_thisOrNextLayersHaveLocalAttachment : 1; // True if any of this or subsequent layers has local attachment.
     mutable unsigned m_cachedPropertiesComputed : 1; // Set once any of the above is accessed. The layers will be frozen thereafter.
 };
 
 } // namespace blink
 
 #endif // FillLayer_h