Request for review (L): 6917766: JSR 292 needs its own deopt handler

[Christian Thalinger]

http://cr.openjdk.java.net/~twisti/6917766/webrev.01/

One thing that may pop into your eye is that I removed the guarantee in
Deoptimization::fetch_unroll_info_helper:

http://cr.openjdk.java.net/~twisti/6917766/webrev.01/src/share/vm/runtime/deoptimization.cpp.udiff.html

I discussed this with Tom and it seems this check is just a duplication
of the logic in frame.  I also removed the Event::log.  

Another way would be to adjust unpack_sp:

http://cr.openjdk.java.net/~twisti/6917766/webrev.00/src/share/vm/runtime/deoptimization.cpp.udiff.html

-- Christian