FrameView: Remove redundant tree walk when unthrottling display:none frames

third_party/WebKit/Source/core/frame/FrameView.h

 /*
    Copyright (C) 1997 Martin Jones (mjones@kde.org)
              (C) 1998 Waldo Bastian (bastian@kde.org)
              (C) 1998, 1999 Torben Weis (weis@kde.org)
              (C) 1999 Lars Knoll (knoll@kde.org)
              (C) 1999 Antti Koivisto (koivisto@kde.org)
    Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
    reserved.
 
    This library is free software; you can redistribute it and/or
@@ skipping 1010 matching lines @@
   LayoutObject* viewportLayoutObject() const;
 
   void collectAnnotatedRegions(LayoutObject&,
                                Vector<AnnotatedRegionValue>&) const;
 
   template <typename Function>
   void forAllNonThrottledFrameViews(const Function&);
 
   void updateViewportIntersectionsForSubtree(
       DocumentLifecycle::LifecycleState targetState);
-  void updateRenderThrottlingStatus(bool hidden,
-                                    bool subtreeThrottled,
-                                    bool forceThrottlingInvalidation = false);
+
+  enum ForceThrottlingInvalidationBehavior {
+    DontForceThrottlingInvalidation,
+    ForceThrottlingInvalidation
+  };
+  enum NotifyChildrenBehavior { DontNotifyChildren, NotifyChildren };
+  void updateRenderThrottlingStatus(
+      bool hidden,
+      bool subtreeThrottled,
+      ForceThrottlingInvalidationBehavior = DontForceThrottlingInvalidation,
+      NotifyChildrenBehavior = NotifyChildren);
   void notifyResizeObservers();
 
   // PaintInvalidationCapableScrollableArea
   LayoutScrollbarPart* resizer() const override { return nullptr; }
 
   bool checkLayoutInvalidationIsAllowed() const;
 
   PaintController* paintController() { return m_paintController.get(); }
 
   LayoutSize m_size;
@@ skipping 207 matching lines @@
                   widget.isFrameView());
 DEFINE_TYPE_CASTS(FrameView,
                   ScrollableArea,
                   scrollableArea,
                   scrollableArea->isFrameView(),
                   scrollableArea.isFrameView());
 
 }  // namespace blink
 
 #endif  // FrameView_h