Bug 56607 – RequestAnimationFrame callbacks prevent Document from being released on detach

• Component: DOM
• Status: RESOLVED FIXED

[Zhenyao Mo]

This is also reported in crbug: http://code.google.com/p/chromium/issues/detail?id=74636

After a discussion with Adam, it seems like using ActiveDOMObject for RequestAnimationFrameCallback is the proper way, however, delete callbacks on Document::detach also fixes this memory holding.

Let's get the quick/simple fix in now and merge back to chrome M10 and M11, then we can do the proper ActiveDOMObject thing on the top of the tree.

[Zhenyao Mo]

Created attachment 86107 [details]
Patch

[Adam Barth]

Comment on attachment 86107 [details]
Patch

Can you add a FIXME comment to both these locations saying that we should consider using ActiveDOMObject in the future?

[Zhenyao Mo]

Will do upon landing.

[Zhenyao Mo]

Committed r81407: <http://trac.webkit.org/changeset/81407>

[James Robinson]

As a nit, I personally like .clear() instead of = 0 to null out an OwnPtr<>'s reference.

As for ActiveDOMObject you are all welcome to debate ap@ on that point but I'm not inclined to jump on that grenade again.

[Zhenyao Mo]

(In reply to comment #5)
> As a nit, I personally like .clear() instead of = 0 to null out an OwnPtr<>'s reference.
> 
> As for ActiveDOMObject you are all welcome to debate ap@ on that point but I'm not inclined to jump on that grenade again.

Feel free to change it, and thanks for the warning of the grenade.  :)