Add monotonic time and target property to cc::AnimationDelegate notifications

This adds monotonic time and target property as arguments to
cc::AnimationDelegate::NotifyAnimation{Started, Finished}.

The existing wall clock time argument can be removed once Blink's legacy
implementation of CSS animations and transitions is removed.

The target property argument is needed so that Blink can distinguish
between notifications for CSS animations/transitions and notifications for
the scroll animations being added for the CSSOM View smooth scroll API.

BUG=299945,243871

Review URL: https://codereview.chromium.org/99733003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239554 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed