Increase ThreadWatcher unresponsive threashold to 72 secs in dev

Increase ThreadWatcher unresponsive threashold to 72 secs in Dev

Increase the #of pings from 9 to 36 for Dev (72 secs of
unresponsiveness).

Increased it to reduce the number of crash dump reports
we receive. Will revert back, when we can auto triage
jank on UI/IO threads.

BUG=352489
R=sky@chromium.org

Committed: https://crrev.com/64792b2912f3be895944800859042103f1ffd6b6
Cr-Commit-Position: refs/heads/master@{#296268}

[ramant (doing other things), 2014-09-22 23:51:12]

Patchset #1 (id:1) has been deleted

[ramant (doing other things), 2014-09-23 00:12:10]

Hi Sky,
  We are getting thousands of crash reports. Until we fix crash system to auto
triage crashes, would like to increase the unresponsive count to 36 pings (72
secs) in Dev.

  PTAL.

thanks
raman

[sky, 2014-09-23 03:01:08]

LGTM

[ramant (doing other things), 2014-09-23 18:16:30]

The CQ bit was checked by rtenneti@chromium.org

[commit-bot: I haz the power, 2014-09-23 20:31:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/588373002/20001

[commit-bot: I haz the power, 2014-09-23 21:54:10]

Committed patchset #1 (id:20001) as e4e909150689e3f05ef441d70f3f23c998e88176

[commit-bot: I haz the power, 2014-09-23 21:54:48]

Patchset 1 (id:??) landed as
https://crrev.com/64792b2912f3be895944800859042103f1ffd6b6
Cr-Commit-Position: refs/heads/master@{#296268}

[ramant (doing other things), 2014-12-09 02:34:16]

A revert of this CL (patchset #1 id:20001) has been created in
https://codereview.chromium.org/783423002/ by rtenneti@chromium.org.

The reason for reverting is: chromecrash calculates the correct magic signature
for jank/hangs on UI/IO/FILE threads. Reverting this change to get crash dumps
if UI/IO/FILE threads don't respond for 9 pings (in 18 secs)..