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

remoting/host/desktop_environment_factory.cc

+// 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.
+
+#include "remoting/host/desktop_environment_factory.h"
+
+#include "remoting/host/audio_capturer.h"
+#include "remoting/host/chromoting_host_context.h"
+#include "remoting/host/desktop_environment.h"
+#include "remoting/host/event_executor.h"
+#include "remoting/host/video_frame_capturer.h"
+
+namespace remoting {
+
+DesktopEnvironmentFactory::DesktopEnvironmentFactory() {
+}
+
+DesktopEnvironmentFactory::~DesktopEnvironmentFactory() {
+}
+
+scoped_ptr<DesktopEnvironment> DesktopEnvironmentFactory::Create(
+    ChromotingHostContext* context) {
+  scoped_ptr<AudioCapturer> audio_capturer = AudioCapturer::Create();
+  scoped_ptr<EventExecutor> event_executor = EventExecutor::Create(
+      context->desktop_task_runner(),
+      context->ui_task_runner());
+  scoped_ptr<VideoFrameCapturer> video_capturer(VideoFrameCapturer::Create());
+  return scoped_ptr<DesktopEnvironment>(new DesktopEnvironment(
+      audio_capturer.Pass(),
+      event_executor.Pass(),
+      video_capturer.Pass()));
+}
+
+bool DesktopEnvironmentFactory::SupportsAudioCapture() const {
+  return AudioCapturer::IsSupported();
+}
+
+}  // namespace remoting