Called on the IO thread to optionally filter resource response content.
The |browser| and |frame| values represent the source of the request, and
may be NULL for requests originating from service workers or
cef_urlrequest_t. |request| and |response| represent the request and
response respectively and cannot be modified in this callback.
Called on the IO thread to optionally filter resource response content. The |browser| and |frame| values represent the source of the request, and may be NULL for requests originating from service workers or cef_urlrequest_t. |request| and |response| represent the request and response respectively and cannot be modified in this callback.