Try to fix Windows Dartium build again

runtime/bin/platform_win.cc

Index: runtime/bin/platform_win.cc
diff --git a/runtime/bin/platform_win.cc b/runtime/bin/platform_win.cc
index 484fb9a8a711dc403f02e99d431ed623dc30581b..1eb9d3b988131415c28e9d7acaf6edca4d48c4ea 100644
--- a/runtime/bin/platform_win.cc
+++ b/runtime/bin/platform_win.cc
@@ -9,7 +9,7 @@
 
 #include "bin/file.h"
 #include "bin/log.h"
-#if !defined(PLATFORM_DISABLE_SOCKET)
+#if !defined(DART_IO_DISABLED) && !defined(PLATFORM_DISABLE_SOCKET)
 #include "bin/socket.h"
 #endif
 #include "bin/utils.h"
@@ -51,7 +51,7 @@ const char* Platform::LibraryExtension() {
 
 
 bool Platform::LocalHostname(char *buffer, intptr_t buffer_length) {
-#if defined(PLATFORM_DISABLE_SOCKET)
+#if defined(DART_IO_DISABLED) || defined(PLATFORM_DISABLE_SOCKET)
   return false;
 #else
   if (!Socket::Initialize()) {