libxml: Fix undefined behavior due to integer overflow when parsing uri port.

Fix undefined behavior due to integer overflow when parsing uri port.

BUG=602280
Committed: https://crrev.com/bc5dfe3dbb61e497438849dbe909520128f5bbac
Cr-Commit-Position: refs/heads/master@{#389650}

[mwp, 2016-04-25 04:22:08]

mwp@chromium.org changed reviewers:
+ ddkilzer@apple.com, dominicc@chromium.org, veillard@gmail.com

[dominicc (has gone to gerrit), 2016-04-25 04:37:11]

Could you file an upstream bug for this and add a link to the crbug and
README.chromium so that I can clean up the README.chromium when we roll over the
upstream fix?

[mwp, 2016-04-26 00:36:55]

Bug filed upstream and the link added to crbug. A pointer to the crbug is in
README.chromium.

[dominicc (has gone to gerrit), 2016-04-26 01:03:34]

The CQ bit was checked by dominicc@chromium.org

[dominicc (has gone to gerrit), 2016-04-26 01:03:34]

lgtm

[commit-bot: I haz the power, 2016-04-26 01:04:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1914903002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1914903002/1

[commit-bot: I haz the power, 2016-04-26 01:10:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-26 01:11:14]

Description was changed from

==========
Fix undefined behavior due to integer overflow when parsing uri port.

BUG=602280
==========

to

==========
Fix undefined behavior due to integer overflow when parsing uri port.

BUG=602280

Committed: https://crrev.com/bc5dfe3dbb61e497438849dbe909520128f5bbac
Cr-Commit-Position: refs/heads/master@{#389650}
==========

[commit-bot: I haz the power, 2016-04-26 01:11:15]

Patchset 1 (id:??) landed as
https://crrev.com/bc5dfe3dbb61e497438849dbe909520128f5bbac
Cr-Commit-Position: refs/heads/master@{#389650}