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 e357928df8be93048699acc68f952d8da0905bdf..b0eca06eceb29a735fa132569293f3315b47318b 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;
@@ -598,6 +599,8 @@ protected:
     };
 
 private:
+    friend class LayoutPart; // For invalidateTreeIfNeeded.
+
     explicit FrameView(LocalFrame*);
 
     virtual void setScrollOffset(const IntPoint&, ScrollType) override;
@@ -630,7 +633,7 @@ private:
     void scheduleOrPerformPostLayoutTasks();
     void performPostLayoutTasks();
 
-    void invalidateTreeIfNeeded(Vector<LayoutObject*>& pendingDelayedPaintInvalidations);
+    void invalidateTreeIfNeeded(PaintInvalidationState&);
 
     DocumentLifecycle& lifecycle() const;