Do-not-commit: Count layout tree memory usage

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

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2009, 2013 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 266 matching lines @@
                       float textWidthSoFar,
                       TextDirection,
                       HashSet<const SimpleFontData*>* fallbackFonts,
                       FloatRect* glyphBoundsAccumulation) const;
 
   void secureText(UChar mask);
 
   bool isText() const =
       delete;  // This will catch anyone doing an unnecessary check.
 
+  char objectSize() const override { return sizeof(this); }
+
   LayoutRect localVisualRect() const override;
 
   void checkConsistency() const;
 
   // We put the bitfield first to minimize padding on 64-bit.
 
   // Whether or not we can be broken into multiple lines.
   bool m_hasBreakableChar : 1;
   // Whether or not we have a hard break (e.g., <pre> with '\n').
   bool m_hasBreak : 1;
@@ skipping 62 matching lines @@
 inline LayoutText* Text::layoutObject() const {
   return toLayoutText(CharacterData::layoutObject());
 }
 
 void applyTextTransform(const ComputedStyle*, String&, UChar);
 AtomicString localeForLineBreakIterator(const ComputedStyle&);
 
 }  // namespace blink
 
 #endif  // LayoutText_h