[New Multicolumn] Make rounded corners clipping multicol-aware.

Source/core/paint/LayerPainter.h

Index: Source/core/paint/LayerPainter.h
diff --git a/Source/core/paint/LayerPainter.h b/Source/core/paint/LayerPainter.h
index fae2c89d0581be795d36203ec145b04166aca746..3fada4440b8e3390b79617ef69449259a54753a6 100644
--- a/Source/core/paint/LayerPainter.h
+++ b/Source/core/paint/LayerPainter.h
@@ -30,7 +30,7 @@ public:
     void paintOverlayScrollbars(GraphicsContext*, const LayoutRect& damageRect, PaintBehavior, RenderObject* paintingRoot = 0);
 
     enum BorderRadiusClippingRule { IncludeSelfForBorderRadius, DoNotIncludeSelfForBorderRadius };
-    static void applyRoundedRectClips(RenderLayer&, const LayerPaintingInfo&, GraphicsContext*, PaintLayerFlags, ClipRecorder&, BorderRadiusClippingRule = IncludeSelfForBorderRadius);
+    static void applyRoundedRectClips(RenderLayer&, const LayerPaintingInfo&, GraphicsContext*, const LayoutPoint& paginationOffset, PaintLayerFlags, ClipRecorder&, BorderRadiusClippingRule = IncludeSelfForBorderRadius);

[chrishtr, 2014/11/13 23:07:38]

fragmentOffset instead of paginationOffset? Same comment applies to the naming
in LayerFragment.

[mstensho (USE GERRIT), 2014/11/14 08:18:48]

Done.

Yeah, paginationOffset isn't a great name. I'd be tempting to call it
fragmentTranslation, or at least something with translation. Because that's what
it is. It's the translation required to get from flow thread coordinates to
visual coordinates. I'll use fragmentOffset here for now, and get back to the
big rename at a later time.

     static void beginTransparencyLayers(GraphicsContext*, RenderLayer&, const RenderLayer* rootLayer, const LayoutRect& paintDirtyRect, const LayoutSize& subPixelAccumulation, PaintBehavior);
 
 private: