- Adds more instrumentation of the Compiler with SpeedTracerLogger.
- Initializes the PermutationWorker with a thread name for debugging
purposes.

Review at http://gwt-code-reviews.appspot.com/742801


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8486 8db76d5a-ed1c-0410-87a9-c151d255dfc7