[remoting android] Add and build host code.

remoting/host/disconnect_window_android.cc

+// 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.
+
+#include "base/logging.h"
+#include "base/macros.h"
+#include "remoting/host/host_window.h"
+
+namespace remoting {
+
+namespace {
+
+class DisconnectWindowAndroid : public HostWindow {
+ public:
+  DisconnectWindowAndroid() {}
+
+  // HostWindow interface.
+  void Start(const base::WeakPtr<ClientSessionControl>& client_session_control)
+      override {
+    NOTIMPLEMENTED();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DisconnectWindowAndroid);
+};
+
+}  // namespace
+
+// static
+scoped_ptr<HostWindow> HostWindow::CreateDisconnectWindow() {
+  return make_scoped_ptr(new DisconnectWindowAndroid());
+}
+
+}  // namespace remoting