Remove section referring to content that no longer exists.

Remove section referring to content that no longer exists.

BUG=none
R=
TEST=none
NOTRY=true
(documentation only change)

Committed: https://crrev.com/f10031e0c6a8d01d36c2fefd63f6567ed4050ffc
Cr-Commit-Position: refs/heads/master@{#294818}

[jpmedley, 2014-09-13 01:22:57]

jmedley@chromium.org changed reviewers:
+ jfb@chromium.org

[JF, 2014-09-13 21:35:54]

lgtm.

It would be nice to eventually put this back together, mentioning Shark on Mac,
perf/oprofile on Linux, and VTune on Windows. I wouldn't go into too many
details, but at least a few pointers would be nice (http://xkcd.com/138/).

[jpmedley, 2014-09-15 14:12:12]

The CQ bit was checked by jmedley@chromium.org

[commit-bot: I haz the power, 2014-09-15 14:12:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/566063003/20001

[commit-bot: I haz the power, 2014-09-15 14:15:35]

Committed patchset #2 (id:20001) as 5141c5d9b4dbde263469df0baac833dc7da73d17

[commit-bot: I haz the power, 2014-09-15 15:08:31]

Patchset 2 (id:??) landed as
https://crrev.com/f10031e0c6a8d01d36c2fefd63f6567ed4050ffc
Cr-Commit-Position: refs/heads/master@{#294818}