Add a forgotten ChromeVox test to the build system.

Add a forgotten ChromeVox test to the build system.

Add content_editable_extractor_test to the gyp file and make it pass.

BUG=371692
Committed: https://crrev.com/546a02d3da2cccc8d78a919db670539c20cf1d6b
Cr-Commit-Position: refs/heads/master@{#293719}

[Peter Lundblad, 2014-09-05 14:01:51]

plundblad@chromium.org changed reviewers:
+ dmazzoni@chromium.org

[Peter Lundblad, 2014-09-05 14:01:51]

Bots fails because this has a dependency on another patch.

[dmazzoni, 2014-09-05 15:57:05]

lgtm

[Peter Lundblad, 2014-09-08 10:35:12]

The CQ bit was checked by plundblad@chromium.org

[commit-bot: I haz the power, 2014-09-08 10:36:18]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/plundblad@chromium.org/548523002/20001

[commit-bot: I haz the power, 2014-09-08 10:40:17]

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

[commit-bot: I haz the power, 2014-09-08 10:40:18]

Try jobs failed on following builders:
  android_aosp on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_aosp/bu...)
  ios_dbg_simulator on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_dbg_simulator...)
  ios_rel_device_ninja on tryserver.chromium.mac
(http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_ni...)
  win_chromium_x64_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Peter Lundblad, 2014-09-08 13:14:23]

The CQ bit was checked by plundblad@chromium.org

[commit-bot: I haz the power, 2014-09-08 13:14:39]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/plundblad@chromium.org/548523002/20001

[commit-bot: I haz the power, 2014-09-08 14:23:14]

Committed patchset #2 (id:20001) as 65ca0c4d86909d8226ea964f7f358f39ed62dc22

[commit-bot: I haz the power, 2014-09-10 03:46:05]

Patchset 2 (id:??) landed as
https://crrev.com/546a02d3da2cccc8d78a919db670539c20cf1d6b
Cr-Commit-Position: refs/heads/master@{#293719}