Print some output in long perf tests, to keep them alive

Print some output in long perf tests, to keep them alive

At least Android try bots seem to have a timeout that will forcibly shut
down the executable if no output has been observed for 60s. Since full
stack test typically run for 60s we need to output give some to avoid
racy shutdown.

BUG=chromium:513170
R=pbos@webrtc.org

Committed: https://chromium.googlesource.com/external/webrtc/+/2c27430545098f17bc716335a8677a9d21cecac0

[sprang_webrtc, 2015-08-11 08:03:02]

sprang@webrtc.org changed reviewers:
+ mflodman@webrtc.org

[sprang_webrtc, 2015-08-31 10:14:05]

sprang@webrtc.org changed reviewers:
+ pbos@webrtc.org
- mflodman@webrtc.org

[sprang_webrtc, 2015-08-31 10:14:05]

Reassigning to pbos

[pbos-webrtc, 2015-08-31 12:30:28]

https://codereview.webrtc.org/1288453003/diff/1/webrtc/video/full_stack.cc
File webrtc/video/full_stack.cc (right):

https://codereview.webrtc.org/1288453003/diff/1/webrtc/video/full_stack.cc#ne...
webrtc/video/full_stack.cc:238: "Uh, I'm-I'm not quite dead, sir.",
Wat? Where should this really be? This should be called every nth frame, right?

[sprang_webrtc, 2015-08-31 13:05:17]

https://codereview.webrtc.org/1288453003/diff/1/webrtc/video/full_stack.cc
File webrtc/video/full_stack.cc (right):

https://codereview.webrtc.org/1288453003/diff/1/webrtc/video/full_stack.cc#ne...
webrtc/video/full_stack.cc:238: "Uh, I'm-I'm not quite dead, sir.",
On 2015/08/31 12:30:27, pbos-webrtc wrote:
> Wat? Where should this really be? This should be called every nth frame,
right?

This should be called for every timeout (kDefaultTimeoutMs = 30s).
Moved to before this if-statement...

[pbos-webrtc, 2015-08-31 13:06:28]

lgtm, good lines

[sprang_webrtc, 2015-08-31 13:08:00]

The CQ bit was checked by sprang@webrtc.org

[commit-bot: I haz the power, 2015-08-31 13:08:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1288453003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1288453003/20001

[commit-bot: I haz the power, 2015-08-31 15:08:23]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-31 15:08:24]

Try jobs failed on following builders:
  android on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  mac_baremetal on tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[sprang_webrtc, 2015-08-31 15:21:28]

Committed patchset #2 (id:20001) manually as
2c27430545098f17bc716335a8677a9d21cecac0 (presubmit successful).