[WIP] do something :-)

Source/core/layout/LayoutText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.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 28 matching lines @@
 #include "core/layout/line/EllipsisBox.h"
 #include "core/layout/line/GlyphOverflow.h"
 #include "core/layout/line/InlineTextBox.h"
 #include "core/paint/DeprecatedPaintLayer.h"
 #include "platform/fonts/Character.h"
 #include "platform/fonts/FontCache.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/text/BidiResolver.h"
 #include "platform/text/TextBreakIterator.h"
 #include "platform/text/TextRunIterator.h"
+#include "wtf/SizeAssertions.h"
 #include "wtf/text/CharacterNames.h"
 #include "wtf/text/StringBuffer.h"
 #include "wtf/text/StringBuilder.h"
 
 using namespace WTF;
 using namespace Unicode;
 
 namespace blink {
 
-struct SameSizeAsLayoutText : public LayoutObject {
-    uint32_t bitfields : 16;
-    float widths[4];
-    String text;
-    void* pointers[2];
-};
-
-static_assert(sizeof(LayoutText) == sizeof(SameSizeAsLayoutText), "LayoutText should stay small");
+ASSERT_SIZE(LayoutText, sizeof(LayoutObject) + 32, sizeof(LayoutObject) + 48);
 
 class SecureTextTimer;
 typedef HashMap<LayoutText*, SecureTextTimer*> SecureTextTimerMap;
 static SecureTextTimerMap* gSecureTextTimers = nullptr;
 
 class SecureTextTimer final : public TimerBase {
 public:
     SecureTextTimer(LayoutText* layoutText)
         : m_layoutText(layoutText)
         , m_lastTypedCharacterOffset(-1)
@@ skipping 1808 matching lines @@
     for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {
         paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*box);
         if (box->truncation() != cNoTruncation) {
             if (EllipsisBox* ellipsisBox = box->root().ellipsisBox())
                 paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*ellipsisBox);
         }
     }
 }
 
 } // namespace blink