(WIP) Invalidation during painting (for synchronized painting)

third_party/WebKit/Source/core/paint/SVGMaskPainter.cpp

Index: third_party/WebKit/Source/core/paint/SVGMaskPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/SVGMaskPainter.cpp b/third_party/WebKit/Source/core/paint/SVGMaskPainter.cpp
index 35c578899719db7e41e75f850532618529d4e5e5..743965c691cea24e4a30b17a340a464b5a46d902 100644
--- a/third_party/WebKit/Source/core/paint/SVGMaskPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/SVGMaskPainter.cpp
@@ -51,10 +51,10 @@ void SVGMaskPainter::drawMaskForLayoutObject(GraphicsContext& context, const Lay
     AffineTransform contentTransformation;
     RefPtr<const SkPicture> maskContentPicture = m_mask.createContentPicture(contentTransformation, targetBoundingBox, context);
 
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutObject, DisplayItem::SVGMask, LayoutPoint()))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, layoutObject, DisplayItem::SVGMask))
         return;
 
-    LayoutObjectDrawingRecorder drawingRecorder(context, layoutObject, DisplayItem::SVGMask, targetPaintInvalidationRect, LayoutPoint());
+    LayoutObjectDrawingRecorder drawingRecorder(context, layoutObject, DisplayItem::SVGMask, targetPaintInvalidationRect);
     context.save();
     context.concatCTM(contentTransformation);
     context.drawPicture(maskContentPicture.get());