Fix painting of fixed background images in composited layers

Source/core/rendering/RenderBoxModelObject.h

Index: Source/core/rendering/RenderBoxModelObject.h
diff --git a/Source/core/rendering/RenderBoxModelObject.h b/Source/core/rendering/RenderBoxModelObject.h
index 31b318612b8197283ee1120f132d02ec6729a205..03520472cc010d0286dcd05266631240ffb410f3 100644
--- a/Source/core/rendering/RenderBoxModelObject.h
+++ b/Source/core/rendering/RenderBoxModelObject.h
@@ -200,6 +200,9 @@ protected:
 
     class BackgroundImageGeometry {
     public:
+        BackgroundImageGeometry()
+            : m_hasNonLocalGeometry(false)
+        { }

[esprehn, 2014/01/08 01:53:55]

nl after }

[Stephen White, 2014/03/27 15:07:12]

Done.

         IntPoint destOrigin() const { return m_destOrigin; }
         void setDestOrigin(const IntPoint& destOrigin)
         {
@@ -244,17 +247,22 @@ protected:
         void useFixedAttachment(const IntPoint& attachmentPoint);
 
         void clip(const IntRect&);
+
+        void setHasNonLocalGeometry(bool hasNonLocalGeometry = true) { m_hasNonLocalGeometry = hasNonLocalGeometry; }
+        bool hasNonLocalGeometry() const { return m_hasNonLocalGeometry; }
+
     private:
         IntRect m_destRect;
         IntPoint m_destOrigin;
         IntPoint m_phase;
         IntSize m_tileSize;
+        bool m_hasNonLocalGeometry; // Has background-attachment: fixed. Implies that we can't always cheaply compute destRect.

[esprehn, 2014/01/08 01:53:55]

Don't stick a bool between the IntSizes, that causes nasty alignment from the
compiler which uses more memory. It should be last.

[Stephen White, 2014/03/27 15:07:12]

Done.

         IntSize m_repeatSpacing;
     };
 
     LayoutPoint adjustedPositionRelativeToOffsetParent(const LayoutPoint&) const;
 
-    void calculateBackgroundImageGeometry(const FillLayer*, const LayoutRect& paintRect, BackgroundImageGeometry&, RenderObject* = 0);
+    void calculateBackgroundImageGeometry(const RenderLayerModelObject* paintContainer, const FillLayer*, const LayoutRect& paintRect, BackgroundImageGeometry&, RenderObject* = 0) const;
     void getBorderEdgeInfo(class BorderEdge[], const RenderStyle*, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true) const;
     bool borderObscuresBackgroundEdge(const FloatSize& contextScale) const;
     bool borderObscuresBackground() const;