Dispatch change event for Input type=range for touchEnd

Adds dispatch change event at touchEnd.

R=tkent@chromium.org, keishi1@chromium.org
BUG=361335
TEST=On touch start check input event is dispatched and on touch end check change event is dispatched

Review URL: https://codereview.chromium.org/234933002

git-svn-id: svn://svn.chromium.org/blink/trunk@171455 bbb929c8-8fbe-4397-9dbb-9b2b20218538