Renable hashing for the basic playback test.
Renable hashing for the basic playback test.

Now that hashing is fixed, trial turning it on again for the basic
playback test.  Tested as much as I can locally since there are no
win_tsan, win_valgrind try bots.

BUG=none
TEST=valgrind, tsan, win_drmemory trybot.


Review URL: http://codereview.chromium.org/9809031

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@129073 0039d316-1c4b-4281-b951-d872f2087c98

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