Begin tracking why layout is invalidated

Source/core/layout/TextAutosizer.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 564 matching lines @@
         }
         renderer = renderer->nextInPreOrder();
     }
 }
 
 void TextAutosizer::setAllTextNeedsLayout()
 {
     LayoutObject* renderer = m_document->layoutView();
     while (renderer) {
         if (renderer->isText())
-            renderer->setNeedsLayoutAndFullPaintInvalidation();
+            renderer->setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::TextAutosizing);
         renderer = renderer->nextInPreOrder();
     }
 }
 
 TextAutosizer::BlockFlags TextAutosizer::classifyBlock(const LayoutObject* renderer, BlockFlags mask) const
 {
     if (!renderer->isLayoutBlock())
         return 0;
 
     const LayoutBlock* block = toLayoutBlock(renderer);
@@ skipping 380 matching lines @@
     style->setTextAutosizingMultiplier(multiplier);
     style->setUnique();
 
     switch (relayoutBehavior) {
     case AlreadyInLayout:
         // Don't free currentStyle until the end of the layout pass. This allows other parts of the system
         // to safely hold raw ComputedStyle* pointers during layout, e.g. BreakingContext::m_currentStyle.
         m_stylesRetainedDuringLayout.append(&currentStyle);
 
         renderer->setStyleInternal(style.release());
-        renderer->setNeedsLayoutAndFullPaintInvalidation();
+        renderer->setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::TextAutosizing);
         break;
 
     case LayoutNeeded:
         renderer->setStyle(style.release());
         break;
     }
 
     if (multiplier != 1)
         m_pageInfo.m_hasAutosized = true;
 }
@@ skipping 175 matching lines @@
     }
     return computedSize;
 }
 
 DEFINE_TRACE(TextAutosizer)
 {
     visitor->trace(m_document);
 }
 
 } // namespace blink