[NetInfo] Add Blink support for connection.change, connection.downlinkMax, and wimax

LayoutTests/netinfo/unregister-during-event.html

Index: LayoutTests/netinfo/unregister-during-event.html
diff --git a/LayoutTests/netinfo/unregister-during-event.html b/LayoutTests/netinfo/unregister-during-event.html
index 9d614ee689b5c78ae3891fa07d365ff468d3f095..7325f8827ef799baa3e5f50352c90bdbc75eaa07 100644
--- a/LayoutTests/netinfo/unregister-during-event.html
+++ b/LayoutTests/netinfo/unregister-during-event.html
@@ -13,18 +13,21 @@ shouldBe('typeof window.internals.observeGC', '"function"',
 
 var otherHandler = function(e) {
     shouldBe('connection.type', 'initialType');
+    shouldBe('connection.downlinkMax', 'initialDownlinkMax');
+
     finishJSTest();
 };
 
 var handler = function(e) {
     shouldBe('connection.type', 'newConnectionType');
-    connection.removeEventListener('typechange', handler);
-    connection.addEventListener('typechange', otherHandler);
-    internals.setNetworkConnectionInfo(initialType);
+    shouldBe('connection.downlinkMax', 'newDownlinkMax');
+    connection.removeEventListener('change', handler);
+    connection.addEventListener('change', otherHandler);
+    internals.setNetworkConnectionInfo(initialType, initialDownlinkMax);
 };
 
-connection.addEventListener('typechange', handler);
-internals.setNetworkConnectionInfo(newConnectionType);
+connection.addEventListener('change', handler);
+internals.setNetworkConnectionInfo(newConnectionType, newDownlinkMax);
 
 </script>
 </body>