Add a basic linux client for Blimp.

blimp/client/session/blimp_client_session_linux.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 BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_LINUX_H_
+#define BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_LINUX_H_
+
+#include "base/macros.h"
+#include "blimp/client/linux/blimp_display_manager.h"
+#include "blimp/client/session/blimp_client_session.h"
+
+namespace ui {
+class PlatformEventSource;
+}
+
+namespace blimp {
+
+class BlimpClientSessionLinux : public BlimpClientSession,
+                                public BlimpDisplayManagerDelegate {
+ public:
+  BlimpClientSessionLinux();
+  ~BlimpClientSessionLinux() override;
+
+  // BlimpDisplayManagerDelegate implementation.
+  void OnClosed() override;
+
+ private:
+  scoped_ptr<ui::PlatformEventSource> event_source_;

[nyquist, 2015/12/17 03:00:21]

For the uninitiated, could you add a comment about this and why it has to be
available before we create the BlimpDisplayManager as the delegate of X11Window?

+  scoped_ptr<BlimpDisplayManager> blimp_display_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlimpClientSessionLinux);
+};
+
+}  // namespace blimp
+
+#endif  // BLIMP_CLIENT_SESSION_BLIMP_CLIENT_SESSION_LINUX_H_