Revert of [ios] Switches ToolbarModelDelegateIOS to use WebStateList.

Revert of [ios] Switches ToolbarModelDelegateIOS to use WebStateList. (patchset #3 id:40001 of https://codereview.chromium.org/2770223003/ )

Reason for revert:
EG tests fail

https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.fyi%2FEarlGreyiOS%2F25732%2F%2B%2Frecipes%2Fsteps%2Fios_chrome_ui_egtests__iPhone_6s_iOS_10.0_%2F0%2Flogs%2Fcrash_report__2017-03-24-125038_%2F0

Original issue's description:
> [ios] Switches ToolbarModelDelegateIOS to use WebStateList.
> 
> There is one method whose implementation still requires Tab and WebController.
> That method has been temporarily implemented using LegacyTabHelper to get the
> Tab for a WebState.
> 
> BUG=None
> 
> Review-Url: https://codereview.chromium.org/2770223003
> Cr-Commit-Position: refs/heads/master@{#459504}
> Committed: https://chromium.googlesource.com/chromium/src/+/5eb449e1e24522d224cc61be49c0cce7c48d05b3

TBR=sdefresne@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

Review-Url: https://codereview.chromium.org/2775943002
Cr-Commit-Position: refs/heads/master@{#459541}
Committed: https://chromium.googlesource.com/chromium/src/+/d62591e0a90b1eeb0b967de96c02c9dba3a79a29

[rohitrao (ping after 24h), 2017-03-24 20:42:17]

The CQ bit was checked by rohitrao@chromium.org

[rohitrao (ping after 24h), 2017-03-24 20:42:17]

Created Revert of [ios] Switches ToolbarModelDelegateIOS to use WebStateList.

[commit-bot: I haz the power, 2017-03-24 20:43:04]

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, 2017-03-24 20:44:03]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490388137482470, "parent_rev":
"e507bb334d3c66917eec47fbc476ed0a7d62f33f", "commit_rev":
"d62591e0a90b1eeb0b967de96c02c9dba3a79a29"}

[commit-bot: I haz the power, 2017-03-24 20:44:53]

Description was changed from

==========
Revert of [ios] Switches ToolbarModelDelegateIOS to use WebStateList. (patchset
#3 id:40001 of https://codereview.chromium.org/2770223003/ )

Reason for revert:
EG tests fail

https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.fyi%2FEarlGreyi...

Original issue's description:
> [ios] Switches ToolbarModelDelegateIOS to use WebStateList.
> 
> There is one method whose implementation still requires Tab and WebController.
> That method has been temporarily implemented using LegacyTabHelper to get the
> Tab for a WebState.
> 
> BUG=None
> 
> Review-Url: https://codereview.chromium.org/2770223003
> Cr-Commit-Position: refs/heads/master@{#459504}
> Committed:
https://chromium.googlesource.com/chromium/src/+/5eb449e1e24522d224cc61be49c0...

TBR=sdefresne@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None
==========

to

==========
Revert of [ios] Switches ToolbarModelDelegateIOS to use WebStateList. (patchset
#3 id:40001 of https://codereview.chromium.org/2770223003/ )

Reason for revert:
EG tests fail

https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.fyi%2FEarlGreyi...

Original issue's description:
> [ios] Switches ToolbarModelDelegateIOS to use WebStateList.
> 
> There is one method whose implementation still requires Tab and WebController.
> That method has been temporarily implemented using LegacyTabHelper to get the
> Tab for a WebState.
> 
> BUG=None
> 
> Review-Url: https://codereview.chromium.org/2770223003
> Cr-Commit-Position: refs/heads/master@{#459504}
> Committed:
https://chromium.googlesource.com/chromium/src/+/5eb449e1e24522d224cc61be49c0...

TBR=sdefresne@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=None

Review-Url: https://codereview.chromium.org/2775943002
Cr-Commit-Position: refs/heads/master@{#459541}
Committed:
https://chromium.googlesource.com/chromium/src/+/d62591e0a90b1eeb0b967de96c02...
==========

[commit-bot: I haz the power, 2017-03-24 20:44:54]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/d62591e0a90b1eeb0b967de96c02...