Combine background repaint conditions in RenderStyle and RenderObject

Source/core/rendering/RenderObject.h

Index: Source/core/rendering/RenderObject.h
diff --git a/Source/core/rendering/RenderObject.h b/Source/core/rendering/RenderObject.h
index 95a00b5e2f49aa709e52da1aa5602b36db140356..346eb888f65a7eb0fec54dff94c9f6a38d5df934 100644
--- a/Source/core/rendering/RenderObject.h
+++ b/Source/core/rendering/RenderObject.h
@@ -525,8 +525,11 @@ public:
     };
     bool hasBoxDecorations() const { return m_bitfields.boxDecorationState() != NoBoxDecorations; }
     bool backgroundIsKnownToBeObscured();
-    bool borderImageIsLoadedAndCanBeRendered() const;
-    bool mustRepaintBackgroundOrBorder() const;
+    bool canRenderBorderImage() const;
+    bool mustRepaintBackgroundOrBorderOnWidthChange() const;
+    bool mustRepaintBackgroundOrBorderOnHeightChange() const;
+    bool mustRepaintFillLayersOnWidthChange(const FillLayer&) const;
+    bool mustRepaintFillLayersOnHeightChange(const FillLayer&) const;
     bool hasBackground() const { return style()->hasBackground(); }
     bool hasEntirelyFixedBackground() const;