Update for changes to DevToolsFrontendHostDelegate in Chrome 31
Update for changes to net::FileProtocolHandler in Chrome 31

I just copied the way that Chrome initializes this object.
Update for changes to content::CreatePersistentCookieStore in Chrome 31

I just copied how Chrome initializes this object.
Stop setting helper process names on OS X

See https://codereview.chromium.org/45253002.