(WIP) Invalidation during painting (for synchronized painting)

third_party/WebKit/Source/core/paint/PaintLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 2759 matching lines @@
         container->m_needsRepaint = true;
         layer = container;
     }
 }
 
 void PaintLayer::clearNeedsRepaintRecursively()
 {
     for (PaintLayer* child = firstChild(); child; child = child->nextSibling())
         child->clearNeedsRepaintRecursively();
     m_needsRepaint = false;
+    fprintf(stderr, "---clearNeedsRepaint: %p %s\n", this, debugName().ascii().data());
 }
 
 PaintTiming* PaintLayer::paintTiming()
 {
     if (Node* node = layoutObject()->node())
         return &PaintTiming::from(node->document());
     return nullptr;
 }
 
 DisableCompositingQueryAsserts::DisableCompositingQueryAsserts()
@@ skipping 18 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif