Re-land socket refactor with fixes for Windows.

runtime/bin/socket_unsupported.cc

Index: runtime/bin/socket_unsupported.cc
diff --git a/runtime/bin/socket_unsupported.cc b/runtime/bin/socket_unsupported.cc
index 39b2f57e497e7fcbad606f382e4a5bde31524be9..a1e08b7b7c550f9176b594bc58e2e4134942bc95 100644
--- a/runtime/bin/socket_unsupported.cc
+++ b/runtime/bin/socket_unsupported.cc
@@ -15,17 +15,6 @@ bool short_socket_read = false;
 
 bool short_socket_write = false;
 
-void FUNCTION_NAME(InternetAddress_Parse)(Dart_NativeArguments args) {
-  Dart_ThrowException(
-      DartUtils::NewDartArgumentError("Sockets unsupported on this platform"));
-}
-
-
-void FUNCTION_NAME(NetworkInterface_ListSupported)(Dart_NativeArguments args) {
-  Dart_ThrowException(
-      DartUtils::NewDartArgumentError("Sockets unsupported on this platform"));
-}
-
 
 void FUNCTION_NAME(Socket_CreateConnect)(Dart_NativeArguments args) {
   Dart_ThrowException(
@@ -39,12 +28,6 @@ void FUNCTION_NAME(Socket_CreateBindConnect)(Dart_NativeArguments args) {
 }
 
 
-void FUNCTION_NAME(Socket_IsBindError)(Dart_NativeArguments args) {
-  Dart_ThrowException(
-      DartUtils::NewDartArgumentError("Sockets unsupported on this platform"));
-}
-
-
 void FUNCTION_NAME(Socket_CreateBindDatagram)(Dart_NativeArguments args) {
   Dart_ThrowException(
       DartUtils::NewDartArgumentError("Sockets unsupported on this platform"));