Upstream ios/web/ HTML tokenizer

Upstream ios/web/ HTML tokenizer

This upstreams the exising "third"-party HTML tokenizer used for
network-level injection, which is used to find the insertion point
for network JS injection.

BUG=464810
Committed: https://crrev.com/ff38f0272c5f1268a8b7387b18fe37689bd14332
Cr-Commit-Position: refs/heads/master@{#322155}

[stuartmorgan, 2015-03-24 21:18:39]

stuartmorgan@chromium.org changed reviewers:
+ rohitrao@chromium.org

[stuartmorgan, 2015-03-24 21:18:39]

I just noticed that the diff files relative to the original code were never
landed as part of checking this in, which was an oversight. Since it's an
existing issue I don't think it should block upstreaming, but we should
definitely add them if/when we update this code from the source.

[rohitrao (ping after 24h), 2015-03-25 13:33:42]

lgtm

[stuartmorgan, 2015-03-25 13:38:39]

The CQ bit was checked by stuartmorgan@chromium.org

[commit-bot: I haz the power, 2015-03-25 13:38:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1031023002/1

[commit-bot: I haz the power, 2015-03-25 14:15:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-25 14:15:59]

Patchset 1 (id:??) landed as
https://crrev.com/ff38f0272c5f1268a8b7387b18fe37689bd14332
Cr-Commit-Position: refs/heads/master@{#322155}