Add early returns in CJBig2_TRDProc::decode_Arith when decode fails.

Add early returns in CJBig2_TRDProc::decode_Arith when decode fails.

None of the decodes in the method are currently being checked. This is
causing pdfium to take a long time rendering corrupted files. Thus, I
added a couple of early returns to help prevent this from happening.

BUG=450971
Committed: https://pdfium.googlesource.com/pdfium/+/3f8cb532c93bd2839073ed4949d051245de5a4cb

[npm, 2016-11-09 23:18:04]

The CQ bit was checked by npm@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-09 23:18:14]

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

[npm, 2016-11-09 23:19:16]

Description was changed from

==========
Add early returns in CJBig2_TRDProc::decode_Arith when decode fails.

None of the decodes in the method are currently being checked. This is
causing pdfium to take a long time rendering corrupted files. Thus, I
added a couple of early returns to help prevent this from happening.

BUG=450971
==========

to

==========
Add early returns in CJBig2_TRDProc::decode_Arith when decode fails.

None of the decodes in the method are currently being checked. This is
causing pdfium to take a long time rendering corrupted files. Thus, I
added a couple of early returns to help prevent this from happening.

BUG=450971
==========

[npm, 2016-11-09 23:19:17]

npm@chromium.org changed reviewers:
+ dsinclair@chromium.org, thestig@chromium.org, tsepez@chromium.org

[npm, 2016-11-09 23:27:31]

PTAL

[npm, 2016-11-09 23:29:00]

The CQ bit was checked by npm@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-09 23:29:04]

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

[Lei Zhang, 2016-11-10 00:44:35]

lgtm

[dsinclair, 2016-11-10 01:16:36]

lgtm

[dsinclair, 2016-11-10 01:16:41]

The CQ bit was checked by dsinclair@chromium.org

[dsinclair, 2016-11-10 01:16:41]

The CQ bit was unchecked by dsinclair@chromium.org

[commit-bot: I haz the power, 2016-11-10 01:16:43]

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

[dsinclair, 2016-11-10 01:16:47]

The CQ bit was checked by dsinclair@chromium.org

[commit-bot: I haz the power, 2016-11-10 01:16:53]

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, 2016-11-10 01:26:29]

Description was changed from

==========
Add early returns in CJBig2_TRDProc::decode_Arith when decode fails.

None of the decodes in the method are currently being checked. This is
causing pdfium to take a long time rendering corrupted files. Thus, I
added a couple of early returns to help prevent this from happening.

BUG=450971
==========

to

==========
Add early returns in CJBig2_TRDProc::decode_Arith when decode fails.

None of the decodes in the method are currently being checked. This is
causing pdfium to take a long time rendering corrupted files. Thus, I
added a couple of early returns to help prevent this from happening.

BUG=450971

Committed:
https://pdfium.googlesource.com/pdfium/+/3f8cb532c93bd2839073ed4949d051245de5...
==========

[commit-bot: I haz the power, 2016-11-10 01:26:30]

Committed patchset #2 (id:20001) as
https://pdfium.googlesource.com/pdfium/+/3f8cb532c93bd2839073ed4949d051245de5...