Remove macCharCode from inspector code.

Follow up to https://codereview.chromium.org/236403002/

BUG=362927

Review URL: https://codereview.chromium.org/236353003

git-svn-id: svn://svn.chromium.org/blink/trunk@171476 bbb929c8-8fbe-4397-9dbb-9b2b20218538