Minor performance improvement:
Minor performance improvement:

Factoring Range, NodeIterator and MutationEvent handling code into private
methods. The majority of applications do not use these features of DOM so
this code rarely gets executed. Moving the code reduces the size of the
methods which contained them, increasing the chances that they will get 
inlined at runtime.

git-svn-id: 21df804813e9d3638e43477f308dd0be51e5f30f@476034 13f79535-47bb-0310-9956-ffa450edef68

RackerWilliams/xercesj,RackerWilliams/xercesj,ronsigal/xerces,jimma/xerces,jimma/xerces,ronsigal/xerces,jimma/xerces,RackerWilliams/xercesj,ronsigal/xerces