Revert of Deprecate native and extension notification delegates.

Revert of Deprecate native and extension notification delegates. (patchset #2 id:20001 of https://codereview.chromium.org/2928303002/ )

Reason for revert:
Breaks https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Trusty%20ASAN.

Original issue's description:
> Deprecate native and extension notification delegates.
> 
> WebNotificationDelegate can now handle extensions and all web
> notifications as a result.
> 
> TBR=avi@chromium.org
> BUG=720345
> 
> Review-Url: https://codereview.chromium.org/2928303002
> Cr-Commit-Position: refs/heads/master@{#479347}
> Committed: https://chromium.googlesource.com/chromium/src/+/d95830c60e22fa695f0521004149caf03bcc2f77

TBR=peter@chromium.org,avi@chromium.org,miguelg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=720345
Review-Url: https://codereview.chromium.org/2941743002
Cr-Commit-Position: refs/heads/master@{#479357}
Committed: https://chromium.googlesource.com/chromium/src/+/b960aca0d0a3938b7400d508128eadf3951fc00d

[Henrik Grunell, 2017-06-14 12:32:00]

The CQ bit was checked by grunell@chromium.org

[Henrik Grunell, 2017-06-14 12:32:01]

Created Revert of Deprecate native and extension notification delegates.

[commit-bot: I haz the power, 2017-06-14 12:32:10]

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, 2017-06-14 12:32:46]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497443520803160, "parent_rev":
"d286e306130245f8b7dec0a9da7aa3af8aaf1f82", "commit_rev":
"b960aca0d0a3938b7400d508128eadf3951fc00d"}

[commit-bot: I haz the power, 2017-06-14 12:33:02]

Description was changed from

==========
Revert of Deprecate native and extension notification delegates. (patchset #2
id:20001 of https://codereview.chromium.org/2928303002/ )

Reason for revert:
Breaks
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Trusty....

Original issue's description:
> Deprecate native and extension notification delegates.
> 
> WebNotificationDelegate can now handle extensions and all web
> notifications as a result.
> 
> TBR=avi@chromium.org
> BUG=720345
> 
> Review-Url: https://codereview.chromium.org/2928303002
> Cr-Commit-Position: refs/heads/master@{#479347}
> Committed:
https://chromium.googlesource.com/chromium/src/+/d95830c60e22fa695f0521004149...

TBR=peter@chromium.org,avi@chromium.org,miguelg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=720345
==========

to

==========
Revert of Deprecate native and extension notification delegates. (patchset #2
id:20001 of https://codereview.chromium.org/2928303002/ )

Reason for revert:
Breaks
https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Trusty....

Original issue's description:
> Deprecate native and extension notification delegates.
> 
> WebNotificationDelegate can now handle extensions and all web
> notifications as a result.
> 
> TBR=avi@chromium.org
> BUG=720345
> 
> Review-Url: https://codereview.chromium.org/2928303002
> Cr-Commit-Position: refs/heads/master@{#479347}
> Committed:
https://chromium.googlesource.com/chromium/src/+/d95830c60e22fa695f0521004149...

TBR=peter@chromium.org,avi@chromium.org,miguelg@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=720345

Review-Url: https://codereview.chromium.org/2941743002
Cr-Commit-Position: refs/heads/master@{#479357}
Committed:
https://chromium.googlesource.com/chromium/src/+/b960aca0d0a3938b7400d508128e...
==========

[commit-bot: I haz the power, 2017-06-14 12:33:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b960aca0d0a3938b7400d508128e...