Allow C++11 Delegated Constructors.

Allow C++11 Delegated Constructors.

An as-small-as-possible change has been made to JSONReader to test
this feature.

R=jamesr@chromium.org

Committed: https://crrev.com/127772eed524dac861781b03ff22bc9d9a408257
Cr-Commit-Position: refs/heads/master@{#303245}

[jamesr, 2014-11-07 16:02:36]

The CQ bit was checked by jamesr@chromium.org

[jamesr, 2014-11-07 16:02:36]

lgtm

[commit-bot: I haz the power, 2014-11-07 16:03:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/685603005/1

[commit-bot: I haz the power, 2014-11-07 16:07:23]

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

[commit-bot: I haz the power, 2014-11-07 16:07:24]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[jamesr, 2014-11-07 16:10:00]

jamesr@chromium.org changed reviewers:
+ danakj@chromium.org

[jamesr, 2014-11-07 16:10:00]

+danakj for base/

[danakj, 2014-11-07 16:11:15]

LGTM

[andersr, 2014-11-07 16:44:42]

The CQ bit was checked by andersr@opera.com

[commit-bot: I haz the power, 2014-11-07 16:46:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/685603005/1

[commit-bot: I haz the power, 2014-11-07 17:03:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-07 17:03:50]

Patchset 1 (id:??) landed as
https://crrev.com/127772eed524dac861781b03ff22bc9d9a408257
Cr-Commit-Position: refs/heads/master@{#303245}