ASSERT on renderer lifecycle

Source/core/rendering/RenderTextFragment.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.
  *
  * 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 74 matching lines @@
     RenderText::willBeDestroyed();
 }
 
 void RenderTextFragment::setText(PassRefPtr<StringImpl> text, bool force)
 {
     RenderText::setText(text, force);
 
     m_start = 0;
     m_end = textLength();
     if (m_firstLetter) {
+        // FIXME: We should not modify the structure of the render tree outside of
+        // recalc style. crbug.com/370458
+        DeprecatedDisableModifyRenderTreeStructureAsserts disabler;
+
         ASSERT(!m_contentString);
         m_firstLetter->destroy();
         m_firstLetter = 0;
         if (Node* t = node()) {
             ASSERT(!t->renderer());
             t->setRenderer(this);
         }
     }
 }
 
@@ skipping 37 matching lines @@
         return;
     RenderObject* nodeRenderer = node()->renderer();
     if (!nodeRenderer || !nodeRenderer->isText() || !toRenderText(nodeRenderer)->isTextFragment())
         return;
 
     if (isDescendantOf(toRenderTextFragment(nodeRenderer)->m_firstLetter))
         result.setIsFirstLetter(true);
 }
 
 } // namespace WebCore