Add a basic linux client for Blimp.

blimp/client/session/blimp_client_session_linux.cc

+// 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.
+
+#include "blimp/client/session/blimp_client_session_linux.h"
+
+#include "base/message_loop/message_loop.h"
+#include "blimp/client/linux/blimp_display_manager.h"
+#include "ui/events/platform/platform_event_source.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace blimp {
+
+BlimpClientSessionLinux::BlimpClientSessionLinux()
+    : event_source_(ui::PlatformEventSource::CreateDefault()) {
+  blimp_display_manager_.reset(new BlimpDisplayManager(gfx::Size(800, 600),

[haibinlu, 2015/12/17 00:32:58]

nit. define a const for size?

+                                                       this,

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

Is it safe to pass |this| as an argument in your own constructor? I guess we
don't assume that the delegate is used in the constructor of BlimpDisplayManager
anyway? Given it currently only contains ::OnClosed I guess that's fine since
that is currently only called through the destructor of X11Window AFAIK.

+                                                       GetRenderWidgetFeature(),
+                                                       GetTabControlFeature()));
+}
+
+BlimpClientSessionLinux::~BlimpClientSessionLinux() {}
+
+void BlimpClientSessionLinux::OnClosed() {
+  base::MessageLoop::current()->QuitNow();
+}
+
+}  // namespace blimp