Statistics of LayoutBox rare data reasons

third_party/WebKit/Source/core/layout/LayoutInline.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc.
  *               All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 181 matching lines @@
                                        const LayoutPoint& additionalOffset,
                                        IncludeBlockVisualOverflowOrNot) const;
 
   using LayoutBoxModelObject::continuation;
   using LayoutBoxModelObject::setContinuation;
 
   bool alwaysCreateLineBoxes() const {
     return alwaysCreateLineBoxesForLayoutInline();
   }
   void setAlwaysCreateLineBoxes(bool alwaysCreateLineBoxes = true) {
+    if (alwaysCreateLineBoxes)
+      m_rareStat.addReason(ReasonLICreatesLineBoxes);
     setAlwaysCreateLineBoxesForLayoutInline(alwaysCreateLineBoxes);
   }
   void updateAlwaysCreateLineBoxes(bool fullLayout);
 
   LayoutRect localCaretRect(InlineBox*,
                             int,
                             LayoutUnit* extraWidthToEndOfLine) final;
 
   bool hitTestCulledInline(HitTestResult&,
                            const HitTestLocation& locationInContainer,
@@ skipping 134 matching lines @@
   // All of the line boxes created for this inline flow. For example,
   // <i>Hello<br>world.</i> will have two <i> line boxes.
   LineBoxList m_lineBoxes;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutInline, isLayoutInline());
 
 }  // namespace blink
 
 #endif  // LayoutInline_h