[CrOS Tether] Add HasConnectedToHost property for Tether networks.

chrome/test/data/extensions/api_test/networking_private/chromeos/test.js

Index: chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
diff --git a/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js b/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
index 3cd6f2e3111e2cd782441b52f2bbef9c5ce909de..f39c1eefed52ef79d0521a47527e42da0572043e 100644
--- a/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
+++ b/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
@@ -92,6 +92,9 @@ var privateHelpers = {
                                                       : properties.Name);
     assertEq(expectedBatteryPercentage, properties.Tether.BatteryPercentage);
     assertEq(expectedCarrier, properties.Tether.Carrier);
+    // TODO(khorimoto): Add the expected value as a parameter once it can be set
+    // via the Tether component.
+    assertFalse(properties.Tether.HasConnectedToHost);
     assertEq(expectedSignalStrength, properties.Tether.SignalStrength);
   }
 };