Allow Registry Iterator functions to use a specified WOW64 mode when iterating.

net/dns/dns_config_service_win.cc

Index: net/dns/dns_config_service_win.cc
diff --git a/net/dns/dns_config_service_win.cc b/net/dns/dns_config_service_win.cc
index 55a2825ff69bec7c202321a791e191e870cc5f96..36499994afeb6824cea09020a2903c4e07d63a21 100644
--- a/net/dns/dns_config_service_win.cc
+++ b/net/dns/dns_config_service_win.cc
@@ -211,7 +211,10 @@ ConfigParseWinResult ReadSystemSettings(DnsSystemSettings* settings) {
     return CONFIG_PARSE_WIN_READ_PRIMARY_SUFFIX;
   }
 
-  base::win::RegistryKeyIterator nrpt_rules(HKEY_LOCAL_MACHINE, kNRPTPath);
+  // This registry key is "shared" between 32-bit and 64-bit hive so safe to
+  // access without any WOW64 access flag. See
+  // http://msdn.microsoft.com/en-us/library/windows/desktop/aa384253.aspx.
+  base::win::RegistryKeyIterator nrpt_rules(HKEY_LOCAL_MACHINE, kNRPTPath, 0);
   settings->have_name_resolution_policy = (nrpt_rules.SubkeyCount() > 0);
 
   return CONFIG_PARSE_WIN_OK;