Simplify and speed up painting of clipping masks

third_party/WebKit/Source/core/paint/PaintLayerPainter.h

Index: third_party/WebKit/Source/core/paint/PaintLayerPainter.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerPainter.h b/third_party/WebKit/Source/core/paint/PaintLayerPainter.h
index 3f805183c5f9654f76f304905c088914880f0d5b..2da034576061c2744a261c96e82680cea08426b8 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerPainter.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayerPainter.h
@@ -16,6 +16,7 @@ namespace blink {
 class ClipRect;
 class PaintLayer;
 class GraphicsContext;
+class LayerClipRecorder;
 class LayoutPoint;
 
 // This class is responsible for painting self-painting PaintLayer.
@@ -120,6 +121,8 @@ class CORE_EXPORT PaintLayerPainter {
                                           const PaintLayerPaintingInfo&,
                                           PaintLayerFlags);
 
+  void fillMaskingFragment(GraphicsContext&, const LayerClipRecorder&);
+
   static bool needsToClip(const PaintLayerPaintingInfo& localPaintingInfo,
                           const ClipRect&);