Traverse into child LayoutViews during invalidateTreeIfNeeded

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 5340a380b8154b9a30615ee8cfc91ccbcbdfaf6c..7c428297ccfe2f5e7a3cd7b40603d812279aee54 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -63,6 +63,7 @@ class LayoutEmbeddedObject;
 class LayoutObject;
 class LayoutScrollbarPart;
 class LayoutView;
+class PaintInvalidationState;
 class Page;
 class ScrollingCoordinator;
 class TracedValue;
@@ -597,6 +598,9 @@ protected:
         TemporaryChange<bool> m_scope;
     };
 
+    // Only for LayoutPart to traverse into sub frames during paint invalidation.
+    void invalidateTreeIfNeeded(PaintInvalidationState&);
+
 private:
     explicit FrameView(LocalFrame*);
 
@@ -630,8 +634,6 @@ private:
     void scheduleOrPerformPostLayoutTasks();
     void performPostLayoutTasks();
 
-    void invalidateTreeIfNeeded(Vector<LayoutObject*>& pendingDelayedPaintInvalidations);
-
     DocumentLifecycle& lifecycle() const;
 
     void contentRectangleForPaintInvalidation(const IntRect&);