Undeprecate DocumentClear, CaptureEvents and ReleaseEvents

Undeprecate DocumentClear, CaptureEvents and ReleaseEvents

These are all specified for Document:
http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#obsolete

There's no spec for Window, so split the CaptureEvents and ReleaseEvents counters.

BUG=none

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169054

[eseidel, 2014-03-11 04:35:34]

I think it's actually good to warn authors here.  Empty methods just cause
confusion.  Eventually we would like to remove these as they serve no purpose in
the platform.

I guess there is an argument that there is so little cost to supporting these
that we might as well keep them indefinitely to keep ancient content working?

[philipj_slow, 2014-03-11 06:55:33]

On 2014/03/11 04:35:34, eseidel wrote:
> I think it's actually good to warn authors here.  Empty methods just cause
> confusion.  Eventually we would like to remove these as they serve no purpose
in
> the platform.
> 
> I guess there is an argument that there is so little cost to supporting these
> that we might as well keep them indefinitely to keep ancient content working?

Context:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/eplNSf8oDfw/S-Wjh7e9...

It's mostly the CaptureEvents deprecation that I'm really after here. At 0.3477%
it's not going to be removed anytime soon. We also need to find out if it needs
to be specified for Window as well.

My thinking is that if we want to eventually remove these, we should start at
the spec end and make sure other browsers are on board. If we're never going to
remove them it could still make sense to warn about their uselessness, that's a
third case of deprecation that I didn't consider in my message to blink-dev.

There's not a big hurry, so we can finish the discussion on blink-dev first.

[philipj_slow, 2014-03-12 16:49:05]

PTAL, blink-dev thread has wound down.

[abarth-chromium, 2014-03-12 19:33:00]

lgtm

[commit-bot: I haz the power, 2014-03-12 19:36:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/193443004/20001

[commit-bot: I haz the power, 2014-03-12 19:49:47]

Change committed as 169054

[philipj_slow, 2014-03-17 08:10:22]

"There's no spec for Window, so split the CaptureEvents and ReleaseEvents
counters."

I thought I had grepped the spec source properly to confirm this, but now I see
that this was a lie:
http://www.whatwg.org/specs/web-apps/current-work/multipage/obsolete.html#Win...

No harm in counting them separately I guess, but let's hope no one reads the
commit message too carefullly...