Add GraphicsLayerDebugInfo::includesNewPaintInvalidation to distinguish paint from new RenderObjects

Source/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 255 matching lines @@
 
     // If the compositing layer offset changes, we need to repaint.
     if (shouldSetNeedsDisplay == SetNeedsDisplay)
         setNeedsDisplay();
 }
 
 void GraphicsLayer::paintGraphicsLayerContents(GraphicsContext& context, const IntRect& clip)
 {
     if (!m_client)
         return;
+    m_debugInfo.setIncludesFirstPaintInvalidation(false);
     incrementPaintCount();
     m_client->paintContents(this, context, m_paintingPhase, clip);
 }
 
 void GraphicsLayer::updateChildList()
 {
     WebLayer* childHost = m_layer->layer();
     childHost->removeAllChildren();
 
     clearContentsLayerIfUnregistered();
@@ skipping 614 matching lines @@
 void GraphicsLayer::setNeedsDisplayInRect(const FloatRect& rect)
 {
     if (drawsContent()) {
         m_layer->layer()->invalidateRect(rect);
         addRepaintRect(rect);
         for (size_t i = 0; i < m_linkHighlights.size(); ++i)
             m_linkHighlights[i]->invalidate();
     }
 }
 
+void GraphicsLayer::setIncludesFirstPaintInvalidation()
+{
+    m_debugInfo.setIncludesFirstPaintInvalidation(true);
+}
+
 void GraphicsLayer::setContentsRect(const IntRect& rect)
 {
     if (rect == m_contentsRect)
         return;
 
     m_contentsRect = rect;
     updateContentsRect();
 }
 
 void GraphicsLayer::setContentsToImage(Image* image)
@@ skipping 136 matching lines @@
 #ifndef NDEBUG
 void showGraphicsLayerTree(const blink::GraphicsLayer* layer)
 {
     if (!layer)
         return;
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif