Every call to RenderObject::setAnimatableStyle() iterates through all m_compositeAnim...

Every call to RenderObject::setAnimatableStyle() iterates through all m_compositeAnimations: potentially O(N^2)
https://bugs.webkit.org/show_bug.cgi?id=38025

This patchs implements updateAnimationTimerForRenderer, it just checks the timeToNextService for
the current RenderObject reducing the amount of iterations.

Reviewed by Simon Fraser.

* page/animation/AnimationController.cpp:
(WebCore):
(WebCore::AnimationControllerPrivate::updateAnimationTimerForRenderer):
(WebCore::AnimationController::updateAnimations):
* page/animation/AnimationControllerPrivate.h:
(AnimationControllerPrivate):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@108616 268f45cc-cd09-0410-ab3c-d52691b4dbfc