Move animation code to new ui/base/animation directory.

BUG=none
TEST=none
TBR=brettw

Review URL: http://codereview.chromium.org/6154001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70743 0039d316-1c4b-4281-b951-d872f2087c98
124 files changed