Mark all private functions in dart: libraries as invisible (*sniff*).

runtime/bin/socket_patch.dart

Index: runtime/bin/socket_patch.dart
diff --git a/runtime/bin/socket_patch.dart b/runtime/bin/socket_patch.dart
index ab5019bffbbcc4dee46f0f56cc759ed877a8fb86..c2cc58705509374020f048e7184231d4c045c3e2 100644
--- a/runtime/bin/socket_patch.dart
+++ b/runtime/bin/socket_patch.dart
@@ -329,7 +329,7 @@ class _NativeSocket extends _NativeSocketNativeWrapper with _ServiceObject {
 
   static Future<List<InternetAddress>> lookup(
       String host, {InternetAddressType type: InternetAddressType.ANY}) {
-    return _IOService.dispatch(_SOCKET_LOOKUP, [host, type._value])
+    return _IOService._dispatch(_SOCKET_LOOKUP, [host, type._value])
         .then((response) {
           if (isErrorResponse(response)) {
             throw createError(response, "Failed host lookup: '$host'");
@@ -343,7 +343,7 @@ class _NativeSocket extends _NativeSocketNativeWrapper with _ServiceObject {
   }
 
   static Future<InternetAddress> reverseLookup(InternetAddress addr) {
-    return _IOService.dispatch(_SOCKET_REVERSE_LOOKUP, [addr._in_addr])
+    return _IOService._dispatch(_SOCKET_REVERSE_LOOKUP, [addr._in_addr])
         .then((response) {
           if (isErrorResponse(response)) {
             throw createError(response, "Failed reverse host lookup", addr);
@@ -357,7 +357,7 @@ class _NativeSocket extends _NativeSocketNativeWrapper with _ServiceObject {
       bool includeLoopback: false,
       bool includeLinkLocal: false,
       InternetAddressType type: InternetAddressType.ANY}) {
-    return _IOService.dispatch(_SOCKET_LIST_INTERFACES, [type._value])
+    return _IOService._dispatch(_SOCKET_LIST_INTERFACES, [type._value])
         .then((response) {
           if (isErrorResponse(response)) {
             throw createError(response, "Failed listing interfaces");