DevTools: [Console] fix regressed array formatting

The regression happened in r172651. This patch returns missed class.

BUG=368362

Review URL: https://codereview.chromium.org/253193004

git-svn-id: svn://svn.chromium.org/blink/trunk@173013 bbb929c8-8fbe-4397-9dbb-9b2b20218538