Implement various getters on DillMember.

tests/standalone/standalone.status

Index: tests/standalone/standalone.status
diff --git a/tests/standalone/standalone.status b/tests/standalone/standalone.status
index 49666b71d3a17e913ff55a697429e86a491dd2b7..e4619bbcf84739654484e1ca6e3f6b6cd72e5bb7 100644
--- a/tests/standalone/standalone.status
+++ b/tests/standalone/standalone.status
@@ -325,7 +325,7 @@ io/named_pipe_script_test: Pass, RuntimeError # Issue 28737
 [ $runtime == vm && $system == linux && $mode == release && $arch == ia32 && $builder_tag == asan ]
 io/socket_close_test: Pass, Timeout # Issue 28502: timeout.
 
-[ $runtime == dart_precompiled || $mode == product ]
+[ $runtime == dart_precompiled || $mode == product && ($compiler != dartk && $compiler != dartkp)]
 io/skipping_dart2js_compilations_test: CompileTimeError # Imports dart:mirrors
 io/test_harness_analyzer_test: CompileTimeError # Imports dart:mirrors
 io/test_runner_test: CompileTimeError # Imports dart:mirrors
@@ -435,30 +435,18 @@ io/socket_info_ipv6_test: SkipByDesign
 io/process_detached_test: Pass, Slow
 io/named_pipe_script_test: RuntimeError
 
-[ ($compiler == dartk || $compiler == dartkp) && ($runtime == vm || $runtime == dart_precompiled) ]
+[ $compiler == dartk || $compiler == dartkp ]
+io/http_proxy_test: Skip # Flaky.
+io/http_response_deadline_test: Skip # Flaky.
+io/http_reuse_server_port_test: Skip # Flaky.
+io/http_server_close_response_after_error_test: Skip # Flaky.
+io/raw_datagram_socket_test: Skip # Flaky.
+
 assert_test: RuntimeError
 io/compile_all_test: Crash
-io/directory_chdir_test: RuntimeError
-io/directory_test: RuntimeError
-io/directory_uri_test: RuntimeError
-io/file_absolute_path_test: RuntimeError
-io/file_uri_test: RuntimeError
 io/http_cookie_test: RuntimeError
 io/http_proxy_advanced_test: RuntimeError
-io/http_proxy_test: Skip # Flaky.
-io/http_reuse_server_port_test: Skip # Flaky.
-io/http_server_close_response_after_error_test: Skip # Flaky
-io/link_async_test: RuntimeError
-io/link_test: RuntimeError
-io/link_uri_test: RuntimeError
-io/platform_test: RuntimeError
-io/raw_datagram_socket_test: Skip # Flaky.
-io/resolve_symbolic_links_test: RuntimeError
-io/skipping_dart2js_compilations_test: Pass
 io/socket_many_connections_test: RuntimeError
-io/test_harness_analyzer_test: Pass
-io/test_runner_test: Pass
-io/uri_platform_test: RuntimeError
 map_insert_remove_oom_test: Crash
 package/package1_test: CompileTimeError
 package/package_test: CompileTimeError