Add chromeos::NetworkStateManager

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
new file mode 100644
index 0000000000000000000000000000000000000000..07a4a7723413ce86fef66d5b5394b819f8656e53
--- /dev/null
+++ b/chromeos/network/network_state_handler_observer.h
@@ -0,0 +1,55 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_OBSERVER_H_
+#define CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_OBSERVER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "chromeos/chromeos_export.h"
+
+namespace chromeos {
+
+class NetworkState;
+
+// Observer class for all network state changes, including changes to
+// active (connecting or connected) services.
+class CHROMEOS_EXPORT NetworkStateHandlerObserver {
+ public:
+  typedef std::vector<const NetworkState*> NetworkStateList;
+
+  NetworkStateHandlerObserver();
+  virtual ~NetworkStateHandlerObserver();
+
+  // Called when one or more network manager properties changes.
+  virtual void NetworkManagerChanged();
+
+  // The list of networks changed.
+  virtual void NetworkListChanged(const NetworkStateList& networks);
+
+  // The list of devices changed. Typically we don't care about the list
+  // 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);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NetworkStateHandlerObserver);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_NETWORK_NETWORK_STATE_HANDLER_OBSERVER_H_