Nullability
Browser API cleanup (launch method moved to suitable class)
Browser API cleanup (static service methods made instance ones)
Browser API cleanup (pornographically named method moved out of public interface)
RUBY-13071: (refactoring) work with RegExpLanguageHost encapsulated into RegExpLanguageHosts
RUBY-13071: (refactoring)  RegExpPropertiesProvider iface merged into RegExpLanguageHost