Enable new media perf pyauto tests.

BUG=110779
TEST=Ran on perf bot.


Review URL: http://codereview.chromium.org/9699034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126801 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/functional/PYAUTO_TESTS

@@ -683,6 +683,8 @@
   'AV_PERF': {
      'linux': [
        'media.media_constrained_network_perf',
+       'media.media_jerky',
+       'media.media_stat_perf',
      ],
   },
 }