Add type casts for KeyframeEffectReadOnly

Add type casts for KeyframeEffectReadOnly

The following type hierarchy exists in core/animation: KeyframeEffect is a
subclass of KeyframeEffectReadOnly is a subclass of AnimationEffectReadOnly.
Type casts have already been defined to convert AnimationEffectReadOnly objects
to KeyframeEffect objects; this patch adds the equivalent for converting to
KeyframeEffectReadOnly.

Committed: https://crrev.com/76ec34ae2976574a0b49a95f6bebddf33b1bd9e5
Cr-Commit-Position: refs/heads/master@{#423758}

[suzyh_UTC10 (ex-contributor), 2016-10-06 01:54:54]

suzyh@chromium.org changed reviewers:
+ alancutter@chromium.org

[alancutter (OOO until 2018), 2016-10-06 02:09:23]

lgtm. Add TODO for converting calls to toKeyframeEffect into
toKeyframeEffectReadOnly where appropriate or do it in this patch.

[suzyh_UTC10 (ex-contributor), 2016-10-06 02:17:20]

On 2016/10/06 at 02:09:23, alancutter wrote:
> lgtm. Add TODO for converting calls to toKeyframeEffect into
toKeyframeEffectReadOnly where appropriate or do it in this patch.

Added a TODO. We can't use toKeyframeEffectReadOnly through the code yet until
after I've moved more of the interface up from KeyframeEffect.

[suzyh_UTC10 (ex-contributor), 2016-10-06 22:58:02]

The CQ bit was checked by suzyh@chromium.org

[suzyh_UTC10 (ex-contributor), 2016-10-06 22:58:02]

The patchset sent to the CQ was uploaded after l-g-t-m from
alancutter@chromium.org
Link to the patchset: https://codereview.chromium.org/2395993002/#ps20001
(title: "Add TODO")

[commit-bot: I haz the power, 2016-10-06 22:58:56]

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, 2016-10-07 00:27:19]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-10-07 00:29:05]

Description was changed from

==========
Add type casts for KeyframeEffectReadOnly

The following type hierarchy exists in core/animation: KeyframeEffect is a
subclass of KeyframeEffectReadOnly is a subclass of AnimationEffectReadOnly.
Type casts have already been defined to convert AnimationEffectReadOnly objects
to KeyframeEffect objects; this patch adds the equivalent for converting to
KeyframeEffectReadOnly.
==========

to

==========
Add type casts for KeyframeEffectReadOnly

The following type hierarchy exists in core/animation: KeyframeEffect is a
subclass of KeyframeEffectReadOnly is a subclass of AnimationEffectReadOnly.
Type casts have already been defined to convert AnimationEffectReadOnly objects
to KeyframeEffect objects; this patch adds the equivalent for converting to
KeyframeEffectReadOnly.

Committed: https://crrev.com/76ec34ae2976574a0b49a95f6bebddf33b1bd9e5
Cr-Commit-Position: refs/heads/master@{#423758}
==========

[commit-bot: I haz the power, 2016-10-07 00:29:06]

Patchset 2 (id:??) landed as
https://crrev.com/76ec34ae2976574a0b49a95f6bebddf33b1bd9e5
Cr-Commit-Position: refs/heads/master@{#423758}