Adds bluetooth connection type to NetworkChangeNotifier.

net/base/network_change_notifier.h

Index: net/base/network_change_notifier.h
diff --git a/net/base/network_change_notifier.h b/net/base/network_change_notifier.h
index 4671e4915b0e0de60ca70e031801aa2d3139ae6f..6b801bc7c424ead6326bde9bd2441bfeca4e30f9 100644
--- a/net/base/network_change_notifier.h
+++ b/net/base/network_change_notifier.h
@@ -32,8 +32,8 @@ class AddressTrackerLinux;
 // destroyed on the same thread.
 class NET_EXPORT NetworkChangeNotifier {
  public:
-  // Using the terminology of the Network Information API:
-  // http://www.w3.org/TR/netinfo-api.
+  // This is a superset of the connection types in the NetInfo v3 specification:
+  // http://w3c.github.io/netinfo/.
   enum ConnectionType {
     CONNECTION_UNKNOWN = 0,  // A connection exists, but its type is unknown.
                              // Also used as a default value.
@@ -43,7 +43,8 @@ class NET_EXPORT NetworkChangeNotifier {
     CONNECTION_3G = 4,
     CONNECTION_4G = 5,
     CONNECTION_NONE = 6,     // No connection.
-    CONNECTION_LAST = CONNECTION_NONE
+    CONNECTION_BLUETOOTH = 7,
+    CONNECTION_LAST = CONNECTION_BLUETOOTH
   };
 
   class NET_EXPORT IPAddressObserver {