DevTools: [SSP] consume event if it inserts a new property

DevTools: [SSP] consume event if it inserts a new property

Currently, if you click on the selector container, there are two
handlers that conflict with each other. The patch fixes
the conflict.

BUG=413894
R=vsevik, apavlov@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181963

[lushnikov, 2014-09-12 21:06:16]

PTAL

[vsevik, 2014-09-12 21:57:09]

The CQ bit was checked by vsevik@chromium.org

[vsevik, 2014-09-12 21:57:09]

lgtm

[commit-bot: I haz the power, 2014-09-12 21:58:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/571653002/20001

[commit-bot: I haz the power, 2014-09-12 22:12:17]

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

[commit-bot: I haz the power, 2014-09-12 22:12:18]

Try jobs failed on following builders:
  android_chromium_gn_compile_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/android_chromium_gn_comp...)

[lushnikov, 2014-09-15 07:16:46]

The CQ bit was checked by lushnikov@chromium.org

[commit-bot: I haz the power, 2014-09-15 07:17:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/571653002/20001

[commit-bot: I haz the power, 2014-09-15 07:29:20]

Committed patchset #2 (id:20001) as 181963