Add GraphicsLayerDebugInfo::includesNewPaintInvalidation to distinguish paint from new RenderObjects

Source/platform/graphics/GraphicsLayer.cpp

Index: Source/platform/graphics/GraphicsLayer.cpp
diff --git a/Source/platform/graphics/GraphicsLayer.cpp b/Source/platform/graphics/GraphicsLayer.cpp
index 649ab82e2683b5da128a9af3a5715149d0b009f5..c3d8f2c00f5bc669589e79165af3b1cbf856e51e 100644
--- a/Source/platform/graphics/GraphicsLayer.cpp
+++ b/Source/platform/graphics/GraphicsLayer.cpp
@@ -273,6 +273,7 @@ void GraphicsLayer::paintGraphicsLayerContents(GraphicsContext& context, const I
 {
     if (!m_client)
         return;
+    m_debugInfo.setIncludesFirstPaintInvalidation(false);
     incrementPaintCount();
     m_client->paintContents(this, context, m_paintingPhase, clip);
 }
@@ -907,6 +908,11 @@ void GraphicsLayer::setNeedsDisplayInRect(const FloatRect& rect)
     }
 }
 
+void GraphicsLayer::setIncludesFirstPaintInvalidation()
+{
+    m_debugInfo.setIncludesFirstPaintInvalidation(true);
+}
+
 void GraphicsLayer::setContentsRect(const IntRect& rect)
 {
     if (rect == m_contentsRect)