Remove BrowserViewController -tabForWebState:.

Remove BrowserViewController -tabForWebState:.

Use LegacyTabHelper to convert a WebState to a Tab in the
BrowserViewController implementation and remove the helper
class that iterated over TabModel.

BUG=None

Review-Url: https://codereview.chromium.org/2680313008
Cr-Commit-Position: refs/heads/master@{#449298}
Committed: https://chromium.googlesource.com/chromium/src/+/0452a9d5c152a81bdbbc2ad5fa4bc7ac95094b3b

[sdefresne, 2017-02-09 13:37:38]

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

[sdefresne, 2017-02-09 13:37:52]

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

[sdefresne, 2017-02-09 13:37:52]

Please take a look.

[commit-bot: I haz the power, 2017-02-09 13:37:59]

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

[rohitrao (ping after 24h), 2017-02-09 13:39:17]

lgtm

[commit-bot: I haz the power, 2017-02-09 14:46:48]

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

[commit-bot: I haz the power, 2017-02-09 14:46:49]

Dry run: This issue passed the CQ dry run.

[sdefresne, 2017-02-09 15:29:27]

The CQ bit was checked by sdefresne@chromium.org

[commit-bot: I haz the power, 2017-02-09 15:29:42]

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, 2017-02-09 15:33:31]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486654167383730, "parent_rev":
"2e0ee286117c4e255aa7121b3c9ff5fc75faaf4b", "commit_rev":
"0452a9d5c152a81bdbbc2ad5fa4bc7ac95094b3b"}

[commit-bot: I haz the power, 2017-02-09 15:34:07]

Description was changed from

==========
Remove BrowserViewController -tabForWebState:.

Use LegacyTabHelper to convert a WebState to a Tab in the
BrowserViewController implementation and remove the helper
class that iterated over TabModel.

BUG=None
==========

to

==========
Remove BrowserViewController -tabForWebState:.

Use LegacyTabHelper to convert a WebState to a Tab in the
BrowserViewController implementation and remove the helper
class that iterated over TabModel.

BUG=None

Review-Url: https://codereview.chromium.org/2680313008
Cr-Commit-Position: refs/heads/master@{#449298}
Committed:
https://chromium.googlesource.com/chromium/src/+/0452a9d5c152a81bdbbc2ad5fa4b...
==========

[commit-bot: I haz the power, 2017-02-09 15:34:08]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/0452a9d5c152a81bdbbc2ad5fa4b...