[Blimp Net] Add EngineAuthHandler.

blimp/net/engine_authentication_handler.h

Index: blimp/net/engine_authentication_handler.h
diff --git a/blimp/net/engine_authentication_handler.h b/blimp/net/engine_authentication_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..686a0966b8c0e32afb317777daf3bcbe13bc60cc
--- /dev/null
+++ b/blimp/net/engine_authentication_handler.h
@@ -0,0 +1,40 @@
+// 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 BLIMP_NET_ENGINE_AUTHENTICATION_HANDLER_H_
+#define BLIMP_NET_ENGINE_AUTHENTICATION_HANDLER_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "blimp/net/blimp_net_export.h"
+#include "blimp/net/connection_handler.h"
+
+namespace blimp {
+
+class BlimpConnection;
+class BlimpMessage;
+
+// Authenticates connections and passes successfully authenticated connections
+// to |connection_handler|.
+class BLIMP_NET_EXPORT EngineAuthenticationHandler : public ConnectionHandler {
+ public:
+  explicit EngineAuthenticationHandler(ConnectionHandler* connection_handler);
+
+  ~EngineAuthenticationHandler() override;
+
+  // ConnectionHandler implementation.
+  void HandleConnection(scoped_ptr<BlimpConnection> connection) override;
+
+ private:
+  // Used to abandon pending authenticated connections if |this| is deleted.
+  base::WeakPtrFactory<ConnectionHandler> connection_handler_weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(EngineAuthenticationHandler);
+};
+
+}  // namespace blimp
+
+#endif  // BLIMP_NET_ENGINE_AUTHENTICATION_HANDLER_H_