Remove all oilpan transitional types

I used do-webcore-rename from Blink/WebKit
which is very good at doing this kind
of search-replace.

Also removed toRefPrtNativeArray after
conversion since it previously had two
separate flavors.  Both versions are no longer
used so I've removed the code until we
need one again.

https://www.irccloud.com/pastebin/5C16p5cE
is the diff I used to do-webcore-rename

TBR=abarth@chromium.org