Begin tracking why layout is invalidated

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index b350721e987bd1a6c3274ff8f3b606b70487432f..9c65062f22f0ad43afdcdc9057f609329b58b3c9 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -461,7 +461,7 @@ void LocalFrame::setPrinting(bool printing, const FloatSize& pageSize, const Flo
         view()->forceLayoutForPagination(pageSize, originalPageSize, maximumShrinkRatio);
     } else {
         if (LayoutView* layoutView = view()->layoutView())
-            layoutView->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
+            layoutView->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::PrintingChanged);
         view()->layout();
         view()->adjustViewSize();
     }