Add optional debugging output of what paint chunks go into what layers.

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 3032 matching lines @@
   if (!m_paintArtifactCompositor) {
     m_paintArtifactCompositor = PaintArtifactCompositor::create();
     page->chromeClient().attachRootLayer(
         m_paintArtifactCompositor->getWebLayer(), &frame());
   }
 
   SCOPED_BLINK_UMA_HISTOGRAM_TIMER("Blink.Compositing.UpdateTime");
 
   m_paintArtifactCompositor->update(
       m_paintController->paintArtifact(),
-      m_paintController->paintChunksRasterInvalidationTrackingMap());
+      m_paintController->paintChunksRasterInvalidationTrackingMap(),
+      m_isStoringCompositedLayerDebugInfo);
 }
 
 std::unique_ptr<JSONObject> FrameView::compositedLayersAsJSON(
     LayerTreeFlags flags) {
   return frame()
       .localFrameRoot()
       ->view()
       ->m_paintArtifactCompositor->layersAsJSON(flags);
 }
 
@@ skipping 1610 matching lines @@
   DCHECK(m_frame->isMainFrame());
   return m_initialViewportSize.width();
 }
 
 int FrameView::initialViewportHeight() const {
   DCHECK(m_frame->isMainFrame());
   return m_initialViewportSize.height();
 }
 
 }  // namespace blink