Propagate connection info to Blimp android UI.

blimp/client/core/session/connection_status.h

Index: blimp/client/core/session/connection_status.h
diff --git a/blimp/client/core/session/connection_status.h b/blimp/client/core/session/connection_status.h
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index 0000000000000000000000000000000000000000..4655e66e442b701feee60082dadd4448afc54ef5
--- /dev/null
+++ b/blimp/client/core/session/connection_status.h
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+// Copyright 2016 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 BLIMP_CLIENT_CORE_SESSION_CONNECTION_STATUS_H_
+#define BLIMP_CLIENT_CORE_SESSION_CONNECTION_STATUS_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
+#include "blimp/client/core/session/network_event_observer.h"
+#include "blimp/client/public/session/assignment.h"
+#include "net/base/ip_endpoint.h"
+
+namespace blimp {
+namespace client {
+
+// Provides Blimp engine connection status, and also broadcasts connection
+// events to observers on main thread.
+class ConnectionStatus : public NetworkEventObserver {
+ public:
+  ConnectionStatus();
+  ~ConnectionStatus() override;
+
+  // Return if we connected to the engine.
+  bool is_connected() const { return is_connected_; }
+
+  // Get engine IP and port.
+  const net::IPEndPoint& engine_endpoint() const { return engine_endpoint_; }
+
+  // Broadcast network events.
+  void AddObserver(NetworkEventObserver* observer);
+  void RemoveObserver(NetworkEventObserver* observer);
+
+  // Set connection states.
+  void OnAssignmentResult(int result, const Assignment& assignment);
+
+  base::WeakPtr<ConnectionStatus> GetWeakPtr();
+
+ private:
+  // NetworkEventObserver implementation.
+  void OnConnected() override;
+  void OnDisconnected(int result) override;
+
+  // Observers listen to session events.
+  base::ObserverList<NetworkEventObserver> connection_observers_;
+
+  // IP address and port of the engine.
+  net::IPEndPoint engine_endpoint_;
+
+  // If the client is currently connected.
+  bool is_connected_;
+
+  base::WeakPtrFactory<ConnectionStatus> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ConnectionStatus);
+};
+
+}  // namespace client
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_CORE_SESSION_CONNECTION_STATUS_H_