Move touch related webkit bug to crbug

ChromeOS touch team is gonna claim these touch related bugs and track
them in crbug.

BUG=261276, 261277, 261278

Review URL: https://chromiumcodereview.appspot.com/19610004

git-svn-id: svn://svn.chromium.org/blink/trunk@154449 bbb929c8-8fbe-4397-9dbb-9b2b20218538