Verify row bytes before alloc in BMP codec.

Verify row bytes before alloc in BMP codec.

If the out_row_bytes is negative the alloc will fail. Verify the size before
alloc and bail if it's negative.

BUG=633381
Committed: https://pdfium.googlesource.com/pdfium/+/0a7552ffa04bfb0c0523bd9c88e55e82842f53a8

[dsinclair, 2016-08-02 19:10:20]

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

[commit-bot: I haz the power, 2016-08-02 19:10:26]

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

[dsinclair, 2016-08-02 19:10:53]

dsinclair@chromium.org changed reviewers:
+ thestig@chromium.org, weili@chromium.org

[dsinclair, 2016-08-02 19:10:53]

PTAL.

[Lei Zhang, 2016-08-02 19:12:36]

lgtm

[dsinclair, 2016-08-02 19:16:47]

The CQ bit was unchecked by dsinclair@chromium.org

[dsinclair, 2016-08-02 19:16:48]

The CQ bit was checked by dsinclair@chromium.org

[commit-bot: I haz the power, 2016-08-02 19:16:57]

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, 2016-08-02 19:36:09]

Description was changed from

==========
Verify row bytes before alloc in BMP codec.

If the out_row_bytes is negative the alloc will fail. Verify the size before
alloc and bail if it's negative.

BUG=633381
==========

to

==========
Verify row bytes before alloc in BMP codec.

If the out_row_bytes is negative the alloc will fail. Verify the size before
alloc and bail if it's negative.

BUG=633381

Committed:
https://pdfium.googlesource.com/pdfium/+/0a7552ffa04bfb0c0523bd9c88e55e82842f...
==========

[commit-bot: I haz the power, 2016-08-02 19:36:11]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/0a7552ffa04bfb0c0523bd9c88e55e82842f...