Remove unused variable in pdfium_engine.

Remove unused variable in pdfium_engine.

Committed: https://crrev.com/06a2721c83107410bae78bd2891bcc8a772660a1
Cr-Commit-Position: refs/heads/master@{#404541}

[jaepark, 2016-07-08 23:12:11]

The CQ bit was checked by jaepark@google.com to run a CQ dry run

[jaepark, 2016-07-08 23:12:41]

jaepark@google.com changed reviewers:
+ thestig@chromium.org

[commit-bot: I haz the power, 2016-07-08 23:12:49]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Lei Zhang, 2016-07-08 23:17:24]

lgtm

[commit-bot: I haz the power, 2016-07-08 23:56:34]

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

[commit-bot: I haz the power, 2016-07-08 23:56:35]

Dry run: This issue passed the CQ dry run.

[jaepark, 2016-07-09 00:08:30]

The CQ bit was checked by jaepark@google.com

[commit-bot: I haz the power, 2016-07-09 00:08:55]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-09 00:14:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-09 00:14:30]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-09 00:17:06]

Description was changed from

==========
Remove unused variable in pdfium_engine.
==========

to

==========
Remove unused variable in pdfium_engine.

Committed: https://crrev.com/06a2721c83107410bae78bd2891bcc8a772660a1
Cr-Commit-Position: refs/heads/master@{#404541}
==========

[commit-bot: I haz the power, 2016-07-09 00:17:07]

Patchset 1 (id:??) landed as
https://crrev.com/06a2721c83107410bae78bd2891bcc8a772660a1
Cr-Commit-Position: refs/heads/master@{#404541}