Handle uncommitted PaintController in DisplayItemClient aliveness tracking

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

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 2519 matching lines @@
     if (GraphicsLayer* layerForScrollCorner = view.compositor()->layerForScrollCorner()) {
         synchronizedPaintRecursively(layerForScrollCorner);
     }
 
     forAllNonThrottledFrameViews([](FrameView& frameView) {
         frameView.lifecycle().advanceTo(DocumentLifecycle::PaintClean);
         LayoutViewItem layoutViewItem = frameView.layoutViewItem();
         if (!layoutViewItem.isNull())
             layoutViewItem.layer()->clearNeedsRepaintRecursively();
     });
+
+#if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
+    DisplayItemClient::endShouldKeepAliveAllClients();
+#endif
 }
 
 void FrameView::synchronizedPaintRecursively(GraphicsLayer* graphicsLayer)
 {
     if (graphicsLayer->drawsContent())
         graphicsLayer->paint(nullptr);
 
     if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
         if (GraphicsLayer* maskLayer = graphicsLayer->maskLayer())
             synchronizedPaintRecursively(maskLayer);
@@ skipping 1585 matching lines @@
     return m_subtreeThrottled || (m_hiddenForThrottling && m_crossOriginForThrottling);
 }
 
 LayoutBox& FrameView::boxForScrollControlPaintInvalidation() const
 {
     ASSERT(!layoutViewItem().isNull());
     return *layoutView();
 }
 
 } // namespace blink