Make core libraries use generic method syntax.

tests/standalone/standalone.status

Index: tests/standalone/standalone.status
diff --git a/tests/standalone/standalone.status b/tests/standalone/standalone.status
index 164c2e74a377b70ffb41941958808de1e6a5f5b9..eb4a5504e9d0039c82d651ce8d9a377ac7a1bc1f 100644
--- a/tests/standalone/standalone.status
+++ b/tests/standalone/standalone.status
@@ -86,6 +86,19 @@ io/file_constructor_test: fail
 # This is runtime test.
 io/process_exit_negative_test: Skip
 
+# Issue #28236
+io/addlatexhash_test: StaticWarning
+io/http_auth_digest_test: StaticWarning
+io/http_auth_test: StaticWarning
+io/http_proxy_advanced_test: StaticWarning
+io/http_proxy_test: StaticWarning
+io/skipping_dart2js_compilations_test: StaticWarning
+io/sleep_test: StaticWarning
+io/test_harness_analyzer_test: StaticWarning
+io/test_runner_test: StaticWarning
+io/web_socket_compression_test: StaticWarning
+io/web_socket_test: StaticWarning
+
 [ $compiler == dart2js ]
 number_identity_test: Skip # Bigints and int/double diff. not supported.
 typed_data_test: Skip # dart:typed_data support needed.