Fixed proxy settings button behaviour: it becomes disabled when device isn't connected to any netwo…

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

Index: chrome/browser/chromeos/system/ash_system_tray_delegate.cc
diff --git a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
index 729437566c5ca54416d089a29c6f97a21164806a..48f03b735644c3ce78621a686877449603c7d912 100644
--- a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
+++ b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
@@ -666,6 +666,10 @@ class SystemTrayDelegate : public ash::SystemTrayDelegate,
     network_menu_->ShowOtherCellular();
   }
 
+  virtual bool IsNetworkConnected() OVERRIDE {
+    return CrosLibrary::Get()->GetNetworkLibrary()->Connected();
+  }
+
   virtual bool GetWifiAvailable() OVERRIDE {
     return CrosLibrary::Get()->GetNetworkLibrary()->wifi_available();
   }