Revert of Convert //net and //chromecast to std::unordered_*

net/base/network_interfaces_linux.h

Index: net/base/network_interfaces_linux.h
diff --git a/net/base/network_interfaces_linux.h b/net/base/network_interfaces_linux.h
index 8fe2284bd4e448589634819bc2c330a6fff7d61b..a030608b054da5b9fab743b75c3fadc77d382bea 100644
--- a/net/base/network_interfaces_linux.h
+++ b/net/base/network_interfaces_linux.h
@@ -9,8 +9,8 @@
 // of network_interfaces_linux.cc to address_tracker_linux and tests.
 
 #include <string>
-#include <unordered_set>
 
+#include "base/containers/hash_tables.h"
 #include "net/base/address_tracker_linux.h"
 #include "net/base/network_interfaces.h"
 
@@ -24,7 +24,7 @@
 NET_EXPORT bool GetNetworkListImpl(
     NetworkInterfaceList* networks,
     int policy,
-    const std::unordered_set<int>& online_links,
+    const base::hash_set<int>& online_links,
     const internal::AddressTrackerLinux::AddressMap& address_map,
     GetInterfaceNameFunction get_interface_name);