Measure XPath usage

Measure XPath usage

We currently don't know how common xpath usage
is in the wild, but we should.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169510

[abarth-chromium, 2014-03-18 23:13:14]

lgtm

[eseidel, 2014-03-18 23:16:22]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2014-03-18 23:16:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eseidel@chromium.org/204003003/1

[commit-bot: I haz the power, 2014-03-18 23:21:12]

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

[commit-bot: I haz the power, 2014-03-18 23:21:12]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[eseidel, 2014-03-18 23:22:39]

The CQ bit was checked by eseidel@chromium.org

[commit-bot: I haz the power, 2014-03-18 23:23:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eseidel@chromium.org/204003003/1

[commit-bot: I haz the power, 2014-03-19 02:52:48]

Change committed as 169510