fix #675: synchronize all the operations on this to ensure the data file doesn't change while URL is being checked @jhreis r?
fix #675: synchronize all the operations on this to ensure the data file
doesn't change while URL is being checked
@jhreis r?

Allow2CEO/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,brave/browser-ios,brave/browser-ios,brave/browser-ios,brave/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,Allow2CEO/browser-ios,Allow2CEO/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,brave/browser-ios