Add GraphicsLayerDebugInfo::includesNewPaintInvalidation to distinguish paint from new RenderObjects

Source/core/rendering/RenderLayerRepainter.cpp

Index: Source/core/rendering/RenderLayerRepainter.cpp
diff --git a/Source/core/rendering/RenderLayerRepainter.cpp b/Source/core/rendering/RenderLayerRepainter.cpp
index d885c7b38f59a36b863bfebedf941558db8fe969..bf88cd32b4b576b14cba7bd591f0e9a776fd3f4a 100644
--- a/Source/core/rendering/RenderLayerRepainter.cpp
+++ b/Source/core/rendering/RenderLayerRepainter.cpp
@@ -137,6 +137,13 @@ void RenderLayerRepainter::setBackingNeedsPaintInvalidationInRect(const LayoutRe
     }
 }
 
+void RenderLayerRepainter::setBackingIncludesFirstPaintInvalidation()
+{
+    GraphicsLayer* backingLayer = m_renderer.layer()->graphicsLayerBacking();
+    if (backingLayer)
+        backingLayer->setIncludesFirstPaintInvalidation();
+}
+
 void RenderLayerRepainter::setFilterBackendNeedsPaintInvalidationInRect(const LayoutRect& rect)
 {
     if (rect.isEmpty())