Adjust idle notification handler to do full GC at the end of idle round in order to compact code space.
Adjust idle notification handler to do full GC at the end of idle round in order to compact code space.

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10639002

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@11900 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh