Replace NetworkError::CorsViolation and NetworkErrorr::SecurityBlock with granular enum variants

Signed-off-by: Uthman Yahaya Baba <uthmanyahayababa@gmail.com>

components/net/fetch/methods.rs

@@ -46,6 +46,7 @@ use crate::protocols::ProtocolRegistry;
 use crate::request_interceptor::RequestInterceptor;
 use crate::subresource_integrity::is_response_integrity_valid;
 
+#[allow(dead_code)]
 const PARTIAL_RESPONSE_TO_NON_RANGE_REQUEST_ERROR: &str = "Refusing to provide partial response\
 from earlier ranged request to API that did not make a range request";
 

components/script/fetch.rs

@@ -225,7 +225,7 @@ impl FetchResponseListener for FetchContext {
         let _ac = enter_realm(&*promise);
         match fetch_metadata {
             // Step 4.1
-            Err(_) => {
+            Err(error) => {
                 promise.reject_error(
                     Error::Type(format!("Network error: {:?}", error)),
                     CanGc::note(),