Made DesktopEnvironment responsible for creation of the disconnect window.

remoting/host/host_window.h

+// Copyright 2013 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_HOST_HOST_WINDOW_H_
+#define REMOTING_HOST_HOST_WINDOW_H_
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/threading/non_thread_safe.h"
+
+namespace remoting {
+
+class ClientSessionControl;
+struct UiStrings;
+
+class HostWindow : public base::NonThreadSafe {
+ public:
+  virtual ~HostWindow() {}
+
+  // Creates a platform-specific instance of the continue window.
+  static scoped_ptr<HostWindow> CreateContinueWindow(
+      const UiStrings& ui_strings);
+
+  // Creates a platform-specific instance of the disconnect window.
+  static scoped_ptr<HostWindow> CreateDisconnectWindow(
+      const UiStrings& ui_strings);
+
+  // Starts the UI state machine. |client_session_control| will be used to
+  // notify the caller about the local user's actions.
+  virtual void Start(
+      const base::WeakPtr<ClientSessionControl>& client_session_control) = 0;
+
+ protected:
+  HostWindow() {}
+
+ private:
+  // Let |HostWindowProxy| to call DetachFromThread() when passing an instance
+  // of |HostWindow| to a different thread.
+  friend class HostWindowProxy;
+
+  DISALLOW_COPY_AND_ASSIGN(HostWindow);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_HOST_WINDOW_H_