bindings: Supports serializer for PerformanceTiming.

bindings: Supports serializer for PerformanceTiming.

Although the spec doesn't have a serializer in PerformanceTiming,
Chrome (til M42) and IE supported a serializer and FF followed them.
Considering the nature of PerformanceTiming, it's quite natural to have
a serializer.

Let's support JSON.stringify (again) for PerformanceTiming.

BUG=497900
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196854

[Yuki, 2015-06-09 12:43:47]

yukishiino@chromium.org changed reviewers:
+ bashi@chromium.org, haraken@chromium.org

[Yuki, 2015-06-09 12:43:48]

Could you guys review this CL?

Just FYI, here is a discussion at Mozilla.
https://bugzilla.mozilla.org/show_bug.cgi?id=760851

[haraken, 2015-06-09 12:57:25]

On 2015/06/09 12:43:48, Yuki wrote:
> Could you guys review this CL?
> 
> Just FYI, here is a discussion at Mozilla.
> https://bugzilla.mozilla.org/show_bug.cgi?id=760851

Can we have a test?

[Yuki, 2015-06-10 08:07:03]

On 2015/06/09 12:57:25, haraken wrote:
> On 2015/06/09 12:43:48, Yuki wrote:
> > Could you guys review this CL?
> > 
> > Just FYI, here is a discussion at Mozilla.
> > https://bugzilla.mozilla.org/show_bug.cgi?id=760851
> 
> Can we have a test?

Yes, added.

[haraken, 2015-06-10 08:17:22]

haraken@chromium.org changed reviewers:
+ tkent@chromium.org

[haraken, 2015-06-10 08:17:23]

LGTM

+tkent-san for API's owner review.

[tkent, 2015-06-10 08:20:14]

lgtm

[Yuki, 2015-06-10 08:21:15]

The CQ bit was checked by yukishiino@chromium.org

[commit-bot: I haz the power, 2015-06-10 08:21:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1171893004/60001

[commit-bot: I haz the power, 2015-06-10 10:03:45]

Committed patchset #4 (id:60001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196854