Remove unnecessary instrumentation for several jank bugs.

Remove unnecessary instrumentation for several jank bugs.

BUG=437890, 436671, 455423, 424386, 436634, 422516
TEST=none
TBR=jochen,cbentzel,jyasskin

Committed: https://crrev.com/379234c28f3856045a67af657296d6911156bbff
Cr-Commit-Position: refs/heads/master@{#324185}

[Peter Kasting, 2015-04-08 01:20:37]

pkasting@chromium.org changed reviewers:
+ cbentzel@chromium.org, jochen@chromium.org, jyasskin@chromium.org

[Peter Kasting, 2015-04-08 01:21:20]

TBR to:

jochen: chrome/, components/, content/ OWNERS
jyasskin: extensions/ OWNERS
cbentzel: net/ OWNERS

[Peter Kasting, 2015-04-08 01:21:52]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2015-04-08 01:22:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1062413002/20001

[commit-bot: I haz the power, 2015-04-08 01:32:06]

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

[commit-bot: I haz the power, 2015-04-08 01:32:07]

Try jobs failed on following builders:
  ios_rel_device_ninja on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)

[Peter Kasting, 2015-04-08 02:13:21]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2015-04-08 02:13:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1062413002/40001

[commit-bot: I haz the power, 2015-04-08 04:42:25]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-04-08 04:43:08]

Patchset 3 (id:??) landed as
https://crrev.com/379234c28f3856045a67af657296d6911156bbff
Cr-Commit-Position: refs/heads/master@{#324185}

[Jeffrey Yasskin, 2015-04-08 05:39:17]

lgtm