Remove SVGAnimatedType

Remove SVGAnimatedType

With the transition to the new SVGProperty hierarchy complete,
SVGAnimatedType is nothing but a wrapper holding a reference to
a NewSVGPropertyBase.
By unwrapping this reference in SVGAnimateElement, and modifying
the SVGAnimatedTypeAnimator interface to pass NewSVGPropertyBase
references instead it becomes possible to remove SVGAnimatedType
without much hassle.

The SVGAnimatedTypeAnimator interfaces are to a large degree left
unchanged, with the exceptions being:

 * addAnimatedTypes is folded in favor just using the add() method
   on NewSVGPropertyBase.

 * resetAnimValToBaseVal returns the value instead of setting it
   through an out-parameter.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=168150

[kouhei (in TOK), 2014-02-27 23:01:07]

lgtm

Thanks a lot for participating in cleanup!

[rwlbuis, 2014-02-28 16:44:51]

lgtm

[rwlbuis, 2014-02-28 16:44:53]

lgtm

[fs, 2014-02-28 17:12:05]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2014-02-28 17:12:16]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/fs@opera.com/183143002/40001

[commit-bot: I haz the power, 2014-02-28 18:30:10]

Change committed as 168150