Range.deleteContents shouldn't throw HierarchyRequestError on doctype

Source/core/dom/Range.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Gunnstein Lye (gunnstein@netcom.no)
  * (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
  * (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility. 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
@@ skipping 444 matching lines @@
 }
 
 bool Range::boundaryPointsValid() const
 {
     TrackExceptionState exceptionState;
     return compareBoundaryPoints(m_start, m_end, exceptionState) <= 0 && !exceptionState.hadException();
 }
 
 void Range::deleteContents(ExceptionState& exceptionState)
 {
-    checkDeleteExtract(exceptionState);
-    if (exceptionState.hadException())
-        return;
+    ASSERT(boundaryPointsValid());

[Yuta Kitamura, 2014/08/12 09:07:43]

Now that the function name "checkDeleteExtract" does not
really make sense, because it is named after its function
that checks the precondition for deleteContents() and
extractContents().

Can you meld its content into extractContents(), or rename
the function to something more sensible like
"checkExtractPrecondition"?

[kangil_, 2014/08/12 10:41:26]

Done.

 
     {
         EventQueueScope eventQueueScope;
         processContents(DELETE_CONTENTS, exceptionState);
     }
 }
 
 bool Range::intersectsNode(Node* refNode, ExceptionState& exceptionState)
 {
     // http://developer.mozilla.org/en/docs/DOM:range.intersectsNode
@@ skipping 1232 matching lines @@
 
 void showTree(const blink::Range* range)
 {
     if (range && range->boundaryPointsValid()) {
         range->startContainer()->showTreeAndMark(range->startContainer(), "S", range->endContainer(), "E");
         fprintf(stderr, "start offset: %d, end offset: %d\n", range->startOffset(), range->endOffset());
     }
 }
 
 #endif