Fetch goog_jitter_received stats for receive stream in WebRTC perf browser test.

Since the default voice send channel has been removed, this statistic will no longer be fetched by calling MaybePrintResultsForAudioSend() on the SSRC in the receiver tab of the one sender/one receiver perf test.

BUG=chromium:547661

Review URL: https://codereview.chromium.org/1446173002

Cr-Commit-Position: refs/heads/master@{#360046}
1 file changed