Base structure.
Method that will be called once for each cookie. |count| is the 0-based index for the current cookie. |total| is the total number of cookies. Set |deleteCookie| to true (1) to delete the cookie currently being visited. Return false (0) to stop visiting cookies. This function may never be called if no cookies are found.
Structure to implement for visiting cookie values. The functions of this structure will always be called on the UI thread.