Improve NetworkStateHandler API

chromeos/network/network_state_handler_observer.h

Index: chromeos/network/network_state_handler_observer.h
diff --git a/chromeos/network/network_state_handler_observer.h b/chromeos/network/network_state_handler_observer.h
index 07a4a7723413ce86fef66d5b5394b819f8656e53..96f25ce64c9a9428e8486cf78554d11950cd6ee3 100644
--- a/chromeos/network/network_state_handler_observer.h
+++ b/chromeos/network/network_state_handler_observer.h
@@ -34,17 +34,18 @@ class CHROMEOS_EXPORT NetworkStateHandlerObserver {
   // of devices, so they are not passed in the method.
   virtual void DeviceListChanged();
 
-  // The active network changed. |network| will be NULL if there is no longer
-  // an active network.
-  virtual void ActiveNetworkChanged(const NetworkState* network);
-
-  // The state of the active network changed.
-  virtual void ActiveNetworkStateChanged(const NetworkState* network);
-
-  // One or more network service properties changed. Note: for the active
-  // network, this will be called in *addition* to ActiveNetworkStateChanged()
-  // if the state property changed.
-  virtual void NetworkServiceChanged(const NetworkState* network);
+  // The default network changed (includes VPNs) or its connection state
+  // changed. |network| will be NULL if there is no longer a default network.
+  virtual void DefaultNetworkChanged(const NetworkState* network);
+
+  // The connection state of |network| changed.
+  virtual void NetworkConnectionStateChanged(const NetworkState* network);
+
+  // One or more properties of |network| have been updated. Note: this will get
+  // called in *addition* to NetworkConnectionStateChanged() when the
+  // connection state property changes. Use this to track properties like
+  // wifi strength.
+  virtual void NetworkPropertiesUpdated(const NetworkState* network);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NetworkStateHandlerObserver);