Fix build following r198658.

Reintroduce the use of ASSERT_UNUSED() in
CharacterIterator{Algorithm}:range() that r198658 dropped. It is needed.

TBR=oilpan-reviews,yosin@chromium.org
BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/1227413004

git-svn-id: svn://svn.chromium.org/blink/trunk@198737 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed
tree: b39a3c7fbac8b720871e0b8fb0803262493e8b10
  1. third_party/