Add some missing null checks in chromevox next.

Add some missing null checks in chromevox next.

BUG=None
TESTED=chromevox_tests
R=dtseng@chromium.org

Committed: https://crrev.com/2f24c2e8ef80d28e13fd139f46f43c78e4b2e4d3
Cr-Commit-Position: refs/heads/master@{#360621}

[David Tseng, 2015-11-17 19:06:25]



https://codereview.chromium.org/1458463002/diff/1/chrome/browser/resources/ch...
File chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
(right):

https://codereview.chromium.org/1458463002/diff/1/chrome/browser/resources/ch...
chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js:600:
if (!this.currentRange_ ||
this.currentRange_ &&

[Peter Lundblad, 2015-11-18 10:47:48]

dtseng@chromium.org writes:
> 
> 
> 
>
https://codereview.chromium.org/1458463002/diff/1/chrome/browser/resources/ch...
> File
> chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
> (right):
> 
>
https://codereview.chromium.org/1458463002/diff/1/chrome/browser/resources/ch...
>
chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js:600:
> if (!this.currentRange_ ||
> this.currentRange_ &&
> 

Done.

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[Peter Lundblad, 2015-11-18 11:08:43]

The CQ bit was checked by plundblad@chromium.org

[commit-bot: I haz the power, 2015-11-18 11:09:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1458463002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1458463002/40001

[commit-bot: I haz the power, 2015-11-18 11:09:04]

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

[commit-bot: I haz the power, 2015-11-18 11:09:04]

No L-G-T-M from a valid reviewer yet. Only full committers are accepted.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Peter Lundblad, 2015-11-19 13:13:51]

PTAL

[dmazzoni, 2015-11-19 17:25:36]

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

[dmazzoni, 2015-11-19 17:25:37]

The CQ bit was checked by dmazzoni@chromium.org

[dmazzoni, 2015-11-19 17:25:37]

lgtm

[commit-bot: I haz the power, 2015-11-19 17:26:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1458463002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1458463002/40001

[commit-bot: I haz the power, 2015-11-19 17:49:52]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-11-19 17:51:29]

Patchset 3 (id:??) landed as
https://crrev.com/2f24c2e8ef80d28e13fd139f46f43c78e4b2e4d3
Cr-Commit-Position: refs/heads/master@{#360621}