Begin tracking why layout is invalidated

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index a03b03244a7ec37b5eb85a1d2da4396021691ddc..08b2df10bb83d794ba6045c71b9cf765b816adf2 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -1526,7 +1526,7 @@ bool Element::pseudoStyleCacheIsInvalid(const LayoutStyle* currentStyle, LayoutS
                 // FIXME: We should do an actual diff to determine whether a repaint vs. layout
                 // is needed, but for now just assume a layout will be required. The diff code
                 // in LayoutObject::setStyle would need to be factored out so that it could be reused.
-                layoutObject()->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
+                layoutObject()->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::StyleChange);
             }
             return true;
         }