ui: Remove some unnecessary functions from the API.
. There is only X11 implementation of IsTouchpadEvent(), and it is used
by DeviceUMA. But DeviceUMA also talks to DeviceDataManagerX11. So
remove ui::IsTouchpadEvent(), and directly query DDMX11 whether the
event is a touchpad event.
. Remove SetNaturalScroll() and IsNaturalScrollEnabled() since nothing uses
these anymore (and there are no implementations of these either).
BUG=none
R=derat@chromium.org
Review URL: https://codereview.chromium.org/
405683002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284306 0039d316-1c4b-4281-b951-d872f2087c98