Begin tracking why layout is invalidated

Source/core/layout/LayoutMenuList.cpp

 /*
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *               2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 101 matching lines @@
         innerStyle.setAlignSelf(ItemPositionFlexStart);
     }
 
     innerStyle.setPaddingLeft(Length(LayoutTheme::theme().popupInternalPaddingLeft(styleRef()), Fixed));
     innerStyle.setPaddingRight(Length(LayoutTheme::theme().popupInternalPaddingRight(styleRef()), Fixed));
     innerStyle.setPaddingTop(Length(LayoutTheme::theme().popupInternalPaddingTop(styleRef()), Fixed));
     innerStyle.setPaddingBottom(Length(LayoutTheme::theme().popupInternalPaddingBottom(styleRef()), Fixed));
 
     if (m_optionStyle) {
         if ((m_optionStyle->direction() != innerStyle.direction() || m_optionStyle->unicodeBidi() != innerStyle.unicodeBidi()))
-            m_innerBlock->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
+            m_innerBlock->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::StyleChange);
         innerStyle.setTextAlign(style()->isLeftToRightDirection() ? LEFT : RIGHT);
         innerStyle.setDirection(m_optionStyle->direction());
         innerStyle.setUnicodeBidi(m_optionStyle->unicodeBidi());
     }
 }
 
 inline HTMLSelectElement* LayoutMenuList::selectElement() const
 {
     return toHTMLSelectElement(node());
 }
@@ skipping 57 matching lines @@
             maxOptionWidth = std::max(maxOptionWidth, style()->font().width(text));
         }
     }
 
     int width = static_cast<int>(ceilf(maxOptionWidth));
     if (m_optionsWidth == width)
         return;
 
     m_optionsWidth = width;
     if (parent())
-        setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation();
+        setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::MenuWidthChanged);
 }
 
 void LayoutMenuList::updateFromElement()
 {
     if (m_optionsChanged) {
         updateOptionsWidth();
         m_optionsChanged = false;
     }
 
     if (m_popupIsVisible)
@@ skipping 388 matching lines @@
     HTMLElement* element = listItems[listIndex];
     return isHTMLOptionElement(*element) && toHTMLOptionElement(*element).selected();
 }
 
 void LayoutMenuList::setTextFromItem(unsigned listIndex)
 {
     setTextFromOption(selectElement()->listToOptionIndex(listIndex));
 }
 
 } // namespace blink