Adding the base ChromotingInstance implementation and unittests. This class will be used by the ap…

remoting/test/remote_connection_observer.h

+// Copyright 2015 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 REMOTING_TEST_REMOTE_CONNECTION_OBSERVER_H_
+#define REMOTING_TEST_REMOTE_CONNECTION_OBSERVER_H_
+
+#include <string>
+
+namespace remoting {
+namespace test {
+
+// Interface for a remote connection observer which will be notified when
+// certain connection status changes occur or events from the remote host
+// are received. Observers must not tear-down the object they have registered
+// while in a callback. The callbacks should be used for informational
+// purposes only.
+class RemoteConnectionObserver {
+ public:
+  RemoteConnectionObserver() {}
+  virtual ~RemoteConnectionObserver() {}
+
+  // Called when the connection state has changed.
+  virtual void ConnectionStateChanged(
+      protocol::ConnectionToHost::State state,
+      protocol::ErrorCode error_code) {}
+
+  // Called when the connection is ready to be used, |ready| will be true once
+  // the video channel has been established.
+  virtual void ConnectionReady(bool ready) {}
+
+  // Called when a channel changes the type of route it is using.
+  virtual void RouteChanged(
+      const std::string& channel_name,
+      const protocol::TransportRoute& route) {}
+
+  // Called when the host sends its list of capabilities to the client.
+  virtual void CapabilitiesSet(const std::string& capabilities) {}
+
+  // Called when a pairing response has been set.
+  virtual void PairingResponseSet(
+      const protocol::PairingResponse& pairing_response) {}
+
+  // Called when we have received an ExtensionMessage from the host.
+  virtual void HostMessageReceived(const protocol::ExtensionMessage& message) {}
+
+  // Called when a connection has been successfully established with the host.
+  virtual void ConnectedToRemoteHost() {}
+
+  // Called when the connection with the remote host has been lost.
+  virtual void DisconnectedFromRemoteHost() {}

[Sergey Ulanov, 2015/03/09 06:44:41]

Why do we need this given there is ConnectionStateChanged()

[joedow, 2015/03/09 21:09:26]

I had intended to use the last two methods (connected/disconnected) in this
interface for observers who didn't want to handle any state or error values, the
logic to determine if the connection was established or disconnected could just
use the last two.

I'll remove them for this CL and see if we need that simplification once I have
more code which uses this interface.

+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(RemoteConnectionObserver);
+};
+
+}  // namespace test
+}  // namespace remoting
+
+#endif  // REMOTING_TEST_REMOTE_CONNECTION_OBSERVER_H_