Upgrade WebKit's DOM library to use textContent instead of falling back to the
slow versions of setInnerText and getInnerText.
Review by: jgw

http://gwt-code-reviews.appspot.com/141808/show


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7564 8db76d5a-ed1c-0410-87a9-c151d255dfc7