Alternate way to track first paint

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 8785635fdab33a054112a64959f25a63da482c0b..bf5d1ff4681a2b5e1eb5435816af63e3db31db10 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -336,7 +336,7 @@ void RenderView::invalidateTreeIfNeeded(const PaintInvalidationState& paintInval
     RenderBlock::invalidateTreeIfNeeded(paintInvalidationState);
 }
 
-void RenderView::invalidatePaintForRectangle(const LayoutRect& paintInvalidationRect) const
+void RenderView::invalidatePaintForRectangle(const LayoutRect& paintInvalidationRect, InvalidationReason invalidationReason) const
 {
     ASSERT(!paintInvalidationRect.isEmpty());
 
@@ -346,7 +346,7 @@ void RenderView::invalidatePaintForRectangle(const LayoutRect& paintInvalidation
     ASSERT(layer()->compositingState() == PaintsIntoOwnBacking || !frame()->ownerRenderer());
 
     if (layer()->compositingState() == PaintsIntoOwnBacking) {
-        setBackingNeedsPaintInvalidationInRect(paintInvalidationRect);
+        setBackingNeedsPaintInvalidationInRect(paintInvalidationRect, invalidationReason);
     } else {
         m_frameView->contentRectangleForPaintInvalidation(pixelSnappedIntRect(paintInvalidationRect));
     }