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 ff1f41082d9daf20e7ac2f30850cded9c70bb79e..c4c954a91a563be0c0cc8da20b4d64cb3c8de2c2 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -406,7 +406,7 @@ 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());
 
@@ -416,7 +416,7 @@ 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));
     }