Add NetworkStateListDetailedView

ash/system/chromeos/network/tray_network_state_observer.h

Index: ash/system/chromeos/network/tray_network_state_observer.h
diff --git a/ash/system/chromeos/network/tray_network_state_observer.h b/ash/system/chromeos/network/tray_network_state_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..c72085186f7c55b1fe66ceb5199b9eff94ac303c
--- /dev/null
+++ b/ash/system/chromeos/network/tray_network_state_observer.h
@@ -0,0 +1,45 @@
+// 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 ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H
+#define ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H
+
+#include "base/compiler_specific.h"
+#include "chromeos/network/network_state_handler_observer.h"
+
+#include <string>
+
+namespace ash {
+namespace internal {
+
+class TrayNetwork;
+
+class TrayNetworkStateObserver : public chromeos::NetworkStateHandlerObserver {
+ public:
+  enum WifiState {
+    WIFI_DISABLED,
+    WIFI_ENABLED,
+    WIFI_UNKNOWN,
+  };
+
+  explicit TrayNetworkStateObserver(TrayNetwork* tray);
+
+  virtual ~TrayNetworkStateObserver();
+
+  // NetworkStateHandlerObserver overrides.
+  virtual void NetworkManagerChanged(const std::string& property) OVERRIDE;
+  virtual void NetworkListChanged(const NetworkStateList& networks) OVERRIDE;
+  virtual void NetworkServiceChanged(const std::string& path) OVERRIDE;
+
+ private:
+  TrayNetwork* tray_;
+  WifiState wifi_state_;  // cache wifi enabled state
+
+  DISALLOW_COPY_AND_ASSIGN(TrayNetworkStateObserver);
+};
+
+}  // namespace ash
+}  // namespace internal
+
+#endif  // ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H