Implement the inert attribute

third_party/WebKit/Source/core/dom/Text.cpp

 /*
  * 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 446 matching lines @@
 
 void Text::UpdateTextLayoutObject(unsigned offset_of_replaced_data,
                                   unsigned length_of_replaced_data) {
   if (!InActiveDocument())
     return;
   LayoutText* text_layout_object = GetLayoutObject();
   if (ShouldUpdateLayoutByReattaching(*this, text_layout_object)) {
     LazyReattachIfAttached();
     return;
   }
+
   text_layout_object->SetTextWithOffset(DataImpl(), offset_of_replaced_data,
                                         length_of_replaced_data);
 }
 
 Text* Text::CloneWithData(const String& data) {
   return Create(GetDocument(), data);
 }
 
 DEFINE_TRACE(Text) {
   CharacterData::Trace(visitor);
 }
 
 }  // namespace blink