Simplify and speed up painting of clipping masks

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

Index: third_party/WebKit/Source/core/paint/LayerClipRecorder.h
diff --git a/third_party/WebKit/Source/core/paint/LayerClipRecorder.h b/third_party/WebKit/Source/core/paint/LayerClipRecorder.h
index b8e3aca3abc84f52a5b7ad1f2b4daa84cbbc2d14..de0f6910f85d23c3bef99ed427ab0930c0b520a5 100644
--- a/third_party/WebKit/Source/core/paint/LayerClipRecorder.h
+++ b/third_party/WebKit/Source/core/paint/LayerClipRecorder.h
@@ -53,18 +53,25 @@ class CORE_EXPORT LayerClipRecorder {
 
   ~LayerClipRecorder();
 
+  // Access to clip rects to support filling mask layers.
+  const IntRect& snappedClipRect() const { return m_snappedClipRect; }
+  const Vector<FloatRoundedRect>& roundedRects() const {
+    return m_roundedRects;
+  }
+
  private:
   void collectRoundedRectClips(PaintLayer&,
                                const PaintLayerPaintingInfo& localPaintingInfo,
                                GraphicsContext&,
                                const LayoutPoint& fragmentOffset,
                                PaintLayerFlags,
-                               BorderRadiusClippingRule,
-                               Vector<FloatRoundedRect>& roundedRectClips);
+                               BorderRadiusClippingRule);
 
   GraphicsContext& m_graphicsContext;
   const LayoutBoxModelObject& m_layoutObject;
   DisplayItem::Type m_clipType;
+  IntRect m_snappedClipRect;
+  Vector<FloatRoundedRect> m_roundedRects;
 };
 
 }  // namespace blink