The cookie database for the WebView control.
The WebView uses network protocols such as HTTP, which store "cookies" to maintain some persistent information across requests.
The same cookie database is shared among all WebView controls running in the same process, so the changes made using methods in this class will affect all WebViews.
This class uses strings to represent cookies. The strings are formatted according to the RFC 6265 specification, found at http://tools.ietf.org/html/rfc6265.