Fix LabelButton::GetThemeAnimation() logic.

My http://crrev.com/162245 missed the animation difference between:
TextButtonBorder::Paint() and TextButtonNativeThemeBorder::Paint().
Also update a low priority TODO.

BUG=155363
TEST=Test [long kHoverAnimationDurationMs] animations in views examples.
R=sky@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11225024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@163331 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed