Add Windows utillity function to verify if a computer is part of a domain.

base/win/win_util.cc

Index: base/win/win_util.cc
diff --git a/base/win/win_util.cc b/base/win/win_util.cc
index cc64c650cb6580bbe41ee1438329b18f4875f6d2..7b85418a1ea79917215a33ec5e0fc125c99fe15b 100644
--- a/base/win/win_util.cc
+++ b/base/win/win_util.cc
@@ -5,6 +5,7 @@
 #include "base/win/win_util.h"
 
 #include <aclapi.h>
+#include <lm.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #include <shobjidl.h>  // Must be before propkey.
@@ -355,6 +356,16 @@ BOOL GetMonitorInfoWrapper(HMONITOR monitor, MONITORINFO* mi) {
   return ret;
 }
 
+bool IsEnrolledToDomain() {
+  LPWSTR domain;
+  NETSETUP_JOIN_STATUS join_status;
+  if(::NetGetJoinInformation(NULL, &domain, &join_status) != NERR_Success)
+    return false;
+  ::NetApiBufferFree(domain);
+
+  return join_status == ::NetSetupDomainName;
+}
+
 }  // namespace win
 }  // namespace base