DRT animation/transition pause API does not pause accelerated animations

[Simon Fraser (smfr)]

The 'pauseAnimationAtTimeOnElementWithId' and 'pauseTransitionAtTimeOnElementWithId' methods available to JS in DRT don't do the right thing for animations that are accelerated, making it hard to write tests that give pixel-accurate results for these kinds of animations.

[Simon Fraser (smfr)]

<rdar://problem/6442932>

[Simon Fraser (smfr)]

Created attachment 33385 [details]
Patch, changelogs

Comment on attachment 33385 [details]
Patch, changelogs

Minor style issues:

> -void AnimationBase::pauseAtTime(double t)
> +void AnimationBase::freezeAtTime(double t)

While you’re at it, please rename 't' to 'time'.

> +    ASSERT(m_startTime);        // if m_startTime is zero, we haven't started yet, so we'll get a bad pause time.

Since it ends with a period, it must begin with a capital “If” instead of “if”.

> +    void freezeAtTime(double t);

No need to name the parameter here.

> +    virtual void suspendAnimations(double time = 0);    // zero value for time means "use currentTime()".

“Zero” instead of “zero”.

[Simon Fraser (smfr)]

Created attachment 33916 [details]
Unbitrotted patch, some tests need tweaking still.

[Simon Fraser (smfr)]

http://trac.webkit.org/changeset/46727