Update Ash network icon code and integrate with tray

ash/system/chromeos/network/tray_network_state_observer.cc

Index: ash/system/chromeos/network/tray_network_state_observer.cc
diff --git a/ash/system/chromeos/network/tray_network_state_observer.cc b/ash/system/chromeos/network/tray_network_state_observer.cc
index 6faed5de7202b0cff63febcff67deefc2fce0b2a..a33eeaa6dcc9dc5daeca0436198e085c703da15d 100644
--- a/ash/system/chromeos/network/tray_network_state_observer.cc
+++ b/ash/system/chromeos/network/tray_network_state_observer.cc
@@ -43,10 +43,24 @@ void TrayNetworkStateObserver::NetworkListChanged() {
   tray::NetworkDetailedView* detailed = tray_->detailed();
   if (detailed)
     detailed->NetworkListChanged();
+  tray_->TrayNetworkUpdated();
+}
+
+void TrayNetworkStateObserver::DeviceListChanged() {
+  tray::NetworkDetailedView* detailed = tray_->detailed();
+  if (detailed)
+    detailed->ManagerChanged();
+  tray_->TrayNetworkUpdated();
+}
+
+void TrayNetworkStateObserver::DefaultNetworkChanged(
+    const chromeos::NetworkState* network) {
+  tray_->TrayNetworkUpdated();
 }
 
 void TrayNetworkStateObserver::NetworkPropertiesUpdated(
     const chromeos::NetworkState* network) {
+  tray_->NetworkServiceChanged(network);
   tray::NetworkDetailedView* detailed = tray_->detailed();
   if (detailed)
     detailed->NetworkServiceChanged(network);