[Reland] Remove PaintInfo's paintingRoot

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

Index: third_party/WebKit/Source/core/paint/PaintInfo.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInfo.cpp b/third_party/WebKit/Source/core/paint/PaintInfo.cpp
index 91de13e37a6ed8730dd3b5c96f6b988216a65ad4..7ada3bcde613dbf473b6b32227dc987b5796959d 100644
--- a/third_party/WebKit/Source/core/paint/PaintInfo.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintInfo.cpp
@@ -6,23 +6,6 @@
 
 namespace blink {
 
-void PaintInfo::updatePaintingRootForChildren(const LayoutObject* layoutObject)
-{
-    if (!paintingRoot)
-        return;
-
-    // If we're the painting root, kids draw normally, and see root of nullptr.
-    if (paintingRoot == layoutObject) {
-        paintingRoot = nullptr;
-        return;
-    }
-}
-
-bool PaintInfo::shouldPaintWithinRoot(const LayoutObject* layoutObject) const
-{
-    return !paintingRoot || paintingRoot == layoutObject;
-}
-
 void PaintInfo::updateCullRect(const AffineTransform& localToParentTransform)
 {
     m_cullRect.updateCullRect(localToParentTransform);