Drag images should paint descendants that are painting siblings of the dragged element

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

Index: third_party/WebKit/Source/core/paint/PaintLayerPaintingInfo.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerPaintingInfo.h b/third_party/WebKit/Source/core/paint/PaintLayerPaintingInfo.h
index 3e76658dde703309b2161a87222468ff0ed4aca6..e3fca6881003c7498d85fd03f4ebe542dec1adf3 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayerPaintingInfo.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayerPaintingInfo.h
@@ -78,10 +78,8 @@ typedef unsigned PaintLayerFlags;
 struct PaintLayerPaintingInfo {
     STACK_ALLOCATED();
     PaintLayerPaintingInfo(PaintLayer* inRootLayer, const LayoutRect& inDirtyRect,
-        GlobalPaintFlags globalPaintFlags, const LayoutSize& inSubPixelAccumulation,
-        LayoutObject* inPaintingRoot = 0)
+        GlobalPaintFlags globalPaintFlags, const LayoutSize& inSubPixelAccumulation)
         : rootLayer(inRootLayer)
-        , paintingRoot(inPaintingRoot)
         , paintDirtyRect(inDirtyRect)
         , subPixelAccumulation(inSubPixelAccumulation)
         , clipToDirtyRect(true)
@@ -93,7 +91,6 @@ struct PaintLayerPaintingInfo {
 
     // TODO(jchaffraix): We should encapsulate all these fields.
     PaintLayer* rootLayer;
-    LayoutObject* paintingRoot; // only paint descendants of this object
     LayoutRect paintDirtyRect; // relative to rootLayer;
     LayoutSize subPixelAccumulation;
     IntSize scrollOffsetAccumulation;