Rewrite DocumentMarkerController to use SynchronousMutationObserver

third_party/WebKit/Source/core/dom/CharacterData.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, 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 133 matching lines @@
   if (!validateOffsetCount(offset, count, length(), realCount, exceptionState))
     return;
 
   String newStr = m_data;
   newStr.remove(offset, realCount);
   newStr.insert(data, offset);
 
   setDataAndUpdate(newStr, offset, realCount, data.length(),
                    UpdateFromNonParser);
 
-  // update the markers for spell checking and grammar checking
   document().didRemoveText(this, offset, realCount);
   document().didInsertText(this, offset, data.length());
 }
 
 String CharacterData::nodeValue() const {
   return m_data;
 }
 
 bool CharacterData::containsOnlyWhitespace() const {
   return m_data.containsOnlyWhitespace();
@@ skipping 51 matching lines @@
     dispatchSubtreeModifiedEvent();
   }
   InspectorInstrumentation::characterDataModified(this);
 }
 
 int CharacterData::maxCharacterOffset() const {
   return static_cast<int>(length());
 }
 
 }  // namespace blink