Determine connection type in NetworkChangeNotifierLinux.

net/base/net_util_linux.h

Index: net/base/net_util_linux.h
diff --git a/net/base/net_util_linux.h b/net/base/net_util_linux.h
index 340c3802eea080878a82db44a6b989a6c329971b..cb871babc8d5ed5eafc2869426092f311a2c69d6 100644
--- a/net/base/net_util_linux.h
+++ b/net/base/net_util_linux.h
@@ -8,9 +8,12 @@
 // This file is only used to expose some of the internals
 // of net_util_linux.cc to tests.
 
+#include <string>
+
 #include "base/containers/hash_tables.h"
 #include "net/base/address_tracker_linux.h"
 #include "net/base/net_util.h"
+#include "net/base/network_change_notifier.h"
 
 namespace net {
 namespace internal {
@@ -18,6 +21,18 @@ namespace internal {
 typedef char* (*GetInterfaceNameFunction)(unsigned int interface_index,
                                           char* ifname);
 
+// Returns the name for the interface with interface index |interface_index|.
+// |buf| should be a pointer to an array of size IFNAMSIZ. The returned pointer
+// will point to |buf|. This function acts like if_indextoname which cannot be
+// used as net/if.h cannot be mixed with linux/if.h. We'll stick with
+// exclusively talking to the kernel and not the C library.
+char* GetInterfaceName(unsigned int interface_index, char* buf);
+
+// Gets the connection type for interface |ifname| by checking for wireless
+// extensions.
+NetworkChangeNotifier::ConnectionType GetInterfaceConnectionType(
+    const std::string& ifname);
+
 NET_EXPORT bool GetNetworkListImpl(
     NetworkInterfaceList* networks,
     int policy,