Remove unused, deprecated WebSetting
Remove unused, deprecated WebSetting

R=ajuma@chromium.org

Review URL: https://codereview.chromium.org/269343005

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@173565 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs