Add logging channel for animations
https://bugs.webkit.org/show_bug.cgi?id=114325

Reviewed by Simon Fraser.

* platform/Logging.cpp: Add LogAnimations.
(WebCore::getChannelFromName): Return LogAnimations for "Animations".
* platform/Logging.h: Add LogAnimations.
* platform/mac/LoggingMac.mm:
(WebCore::initializeLoggingChannelsIfNecessary): Copy preference.
* platform/win/LoggingWin.cpp:
(WebCore::initializeLoggingChannelsIfNecessary): Copy preference.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148071 268f45cc-cd09-0410-ab3c-d52691b4dbfc