Sync the AnimationEvent and TransitionEvent interfaces with the specs

Sync the AnimationEvent and TransitionEvent interfaces with the specs

http://dev.w3.org/csswg/css-animations/#interface-animationevent
http://dev.w3.org/csswg/css-transitions/#transition-events

With the default values in the AnimationEventInit dictionary, it's no
longer necessary to check them in the C++ constructor.

BUG=460722
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196582

[philipj_slow, 2015-06-03 18:40:59]

philipj@opera.com changed reviewers:
+ alancutter@chromium.org

[philipj_slow, 2015-06-03 18:41:00]

PTAL. The double->float TODO honestly doesn't seem sensible to me, do you think
we should have the spec changed to double instead?

[alancutter (OOO until 2018), 2015-06-05 03:37:42]

alancutter@chromium.org changed reviewers:
+ dstockwell@chromium.org, shans@chromium.org

[alancutter (OOO until 2018), 2015-06-05 03:37:42]

Can AnimationEventInit::m_elapsedTime be a double now instead of
Nullable<double>?

+dstockwell +shans for review and spec comments.

[dstockwell, 2015-06-05 06:27:57]

On 2015/06/05 at 03:37:42, alancutter wrote:
> Can AnimationEventInit::m_elapsedTime be a double now instead of
Nullable<double>?
> 
> +dstockwell +shans for review and spec comments.

lgtm

I'm not sure why elapsedTime should be a float, but if that's what the spec says
and other browsers do then fine.

[philipj_slow, 2015-06-05 13:21:37]

On 2015/06/05 03:37:42, alancutter wrote:
> Can AnimationEventInit::m_elapsedTime be a double now instead of
> Nullable<double>?

Good point, I've filed a bug:
https://code.google.com/p/chromium/issues/detail?id=497142

[philipj_slow, 2015-06-05 13:23:46]

On 2015/06/05 06:27:57, dstockwell wrote:
> I'm not sure why elapsedTime should be a float, but if that's what the spec
says
> and other browsers do then fine.

FWIW it is float in Gecko, both in their IDL and C++. It would be silly (extra
conversions) to use float in our IDL if it's double internally, of course.

[philipj_slow, 2015-06-05 13:23:51]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2015-06-05 13:24:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1158233004/20001

[commit-bot: I haz the power, 2015-06-05 15:53:53]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196582