Begin tracking why layout is invalidated

Source/core/layout/LayoutObject.cpp

Index: Source/core/layout/LayoutObject.cpp
diff --git a/Source/core/layout/LayoutObject.cpp b/Source/core/layout/LayoutObject.cpp
index fb721b0781570613712d782a22112e7705d0d525..c5a64f44c21d5f681d8e4eaa9b35e30003e37a52 100644
--- a/Source/core/layout/LayoutObject.cpp
+++ b/Source/core/layout/LayoutObject.cpp
@@ -1730,7 +1730,7 @@ void LayoutObject::setStyle(PassRefPtr<ComputedStyle> style)
 
     if (!diff.needsFullLayout()) {
         if (updatedDiff.needsFullLayout())
-            setNeedsLayoutAndPrefWidthsRecalc();
+            setNeedsLayoutAndPrefWidthsRecalc(LayoutInvalidationReason::StyleChange);
         else if (updatedDiff.needsPositionedMovementLayout())
             setNeedsPositionedMovementLayout();
     }
@@ -1878,7 +1878,7 @@ void LayoutObject::styleDidChange(StyleDifference diff, const ComputedStyle* old
             markContainingBlocksForOverflowRecalc();
 
         if (diff.needsFullLayout())
-            setNeedsLayoutAndPrefWidthsRecalc();
+            setNeedsLayoutAndPrefWidthsRecalc(LayoutInvalidationReason::StyleChange);
     } else if (diff.needsPositionedMovementLayout()) {
         setNeedsPositionedMovementLayout();
     }