[Chromoting] Refactoring DesktopEnvironment and moving screen/audio recorders to ClientSession.

remoting/host/desktop_environment_factory.h

+// Copyright (c) 2012 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_DESKTOP_ENVIRONMENT_FACTORY_H_
+#define REMOTING_HOST_DESKTOP_ENVIRONMENT_FACTORY_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace remoting {
+
+class ChromotingHostContext;
+class DesktopEnvironment;
+
+class DesktopEnvironmentFactory {
+ public:
+  DesktopEnvironmentFactory();
+  virtual ~DesktopEnvironmentFactory();
+
+  virtual scoped_ptr<DesktopEnvironment> Create(
+      ChromotingHostContext* context);
+
+  // Returns |true| if created |DesktopEnvironment| instances support audio
+  // capture.
+  virtual bool SupportsAudioCapture() const;
+
+ protected:
+  DISALLOW_COPY_AND_ASSIGN(DesktopEnvironmentFactory);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_DESKTOP_ENVIRONMENT_FACTORY_H_