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This test can measure PPP_Messaging performance and indirectly IPC
performance. It regressed due to a couple of minor changes; this
gets it running again.

BUG=

Review URL: https://codereview.chromium.org/453003002

Cr-Commit-Position: refs/heads/master@{#288433}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288433 0039d316-1c4b-4281-b951-d872f2087c98