Incrementally invalidate boxes with borders if possible

Source/core/rendering/RenderBox.h

Index: Source/core/rendering/RenderBox.h
diff --git a/Source/core/rendering/RenderBox.h b/Source/core/rendering/RenderBox.h
index b8465a1786f51f49d83b27e4420a1b0545d40462..3b7964e41db940bcf01dff785ed958006812ab56 100644
--- a/Source/core/rendering/RenderBox.h
+++ b/Source/core/rendering/RenderBox.h
@@ -680,6 +680,7 @@ protected:
     virtual InvalidationReason getPaintInvalidationReason(const RenderLayerModelObject& paintInvalidationContainer,
         const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationContainer,
         const LayoutRect& newBounds, const LayoutPoint& newPositionFromPaintInvalidationContainer) OVERRIDE;
+    virtual void incrementallyInvalidatePaint(const RenderLayerModelObject& paintInvalidationContainer, const LayoutRect& oldBounds, const LayoutRect& newBounds, const LayoutPoint& positionFromPaintInvalidationContainer) OVERRIDE;
 
 private:
     void updateShapeOutsideInfoAfterStyleChange(const RenderStyle&, const RenderStyle* oldStyle);
@@ -727,6 +728,8 @@ private:
     }
 
     void savePreviousBorderBoxSizeIfNeeded();
+    LayoutSize getPreviousBorderBoxSize(const LayoutSize& previousBoundsSize) const;

[esprehn, 2014/08/19 01:59:12]

no get(), computePreviousBorderBoxSize(...) ?

[Xianzhu, 2014/08/19 16:06:20]

Done.

+
     bool logicalHeightComputesAsNone(SizeType) const;
 
     void invalidatePaintIfNeeded(const PaintInvalidationState&, const RenderLayerModelObject& newPaintInvalidationContainer);