Make the hash map test run faster by doing less work.
Make the hash map test run faster by doing less work.

It still hits all of the code and runs in seconds on tinyone.
Review URL: http://codereview.chromium.org/113459

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@1970 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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