Push hasValidAttributeName/Type down into SVGAnimateElement

Push hasValidAttributeName/Type down into SVGAnimateElement

Introduce a new "validator" method for SVGSMILElements - hasValidTarget.
With this new method in place, the hasValidAttributeType and
hasValidAttributeName methods can be pushed down the hierarchy to where
they belong, namely SVGAnimateElement.
As a bonus, some conditions and assertions can be simplified.

BUG=641437
Committed: https://crrev.com/1d1019a5021c6668d1195e34f2aa081eab2241c8
Cr-Commit-Position: refs/heads/master@{#424389}

[fs, 2016-10-10 21:11:49]

The CQ bit was checked by fs@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-10-10 21:12:13]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[fs, 2016-10-10 22:13:47]

fs@opera.com changed reviewers:
+ pdr@chromium.org

[pdr., 2016-10-10 22:20:40]

On 2016/10/10 at 22:13:48, fs wrote:
> 

LGTM

[commit-bot: I haz the power, 2016-10-10 22:39:43]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-10 22:39:44]

Dry run: This issue passed the CQ dry run.

[fs, 2016-10-11 08:08:29]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2016-10-11 08:08:34]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-11 08:14:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-11 08:16:34]

Description was changed from

==========
Push hasValidAttributeName/Type down into SVGAnimateElement

Introduce a new "validator" method for SVGSMILElements - hasValidTarget.
With this new method in place, the hasValidAttributeType and
hasValidAttributeName methods can be pushed down the hierarchy to where
they belong, namely SVGAnimateElement.
As a bonus, some conditions and assertions can be simplified.

BUG=641437
==========

to

==========
Push hasValidAttributeName/Type down into SVGAnimateElement

Introduce a new "validator" method for SVGSMILElements - hasValidTarget.
With this new method in place, the hasValidAttributeType and
hasValidAttributeName methods can be pushed down the hierarchy to where
they belong, namely SVGAnimateElement.
As a bonus, some conditions and assertions can be simplified.

BUG=641437

Committed: https://crrev.com/1d1019a5021c6668d1195e34f2aa081eab2241c8
Cr-Commit-Position: refs/heads/master@{#424389}
==========

[commit-bot: I haz the power, 2016-10-11 08:16:35]

Patchset 1 (id:??) landed as
https://crrev.com/1d1019a5021c6668d1195e34f2aa081eab2241c8
Cr-Commit-Position: refs/heads/master@{#424389}