[Font Load Events] Remove FontFaceSet#match().

FontFaceSet's match() method was dropped from the latest editor's draft [1].

[1] http://dev.w3.org/csswg/css-font-load-events/#FontFaceSet-interface

BUG=53213

Review URL: https://codereview.chromium.org/153653002

git-svn-id: svn://svn.chromium.org/blink/trunk@166461 bbb929c8-8fbe-4397-9dbb-9b2b20218538