Begin adding support for tab mirroring via the MediaStream audio/video capturing

content/common/media/media_stream_options.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 CONTENT_COMMON_MEDIA_MEDIA_STREAM_OPTIONS_H_
 #define CONTENT_COMMON_MEDIA_MEDIA_STREAM_OPTIONS_H_
 
 #include <string>
 #include <vector>
 
 #include "content/common/content_export.h"
 #include "content/public/common/media_stream_request.h"
 
 namespace media_stream {
 
+typedef content::MediaStreamDeviceType MediaStreamType;
+
 // StreamOptions is a Chromium representation of WebKit's
 // WebUserMediaRequest Options. It describes the components
 // in a request for a new media stream.
 struct CONTENT_EXPORT StreamOptions {
-  StreamOptions() : audio(false), video(false) {}
-  StreamOptions(bool audio, bool video)
-      : audio(audio), video(video) {}
+  StreamOptions();
+  // TODO(miu): Remove the 2-bools ctor in later clean-up CL.
+  StreamOptions(bool user_audio, bool user_video);
+  StreamOptions(MediaStreamType audio_type, MediaStreamType video_type,
+                const std::string& opt_device_id);
 
-  // True if the stream shall contain an audio input stream.
-  bool audio;
+  // If not NO_SERVICE, the stream shall contain an audio input stream.
+  MediaStreamType audio_type;
 
-  // True if the stream shall contain a video input stream.
-  bool video;
+  // If not NO_SERVICE, the stream shall contain a video input stream.
+  MediaStreamType video_type;
+
+  // If empty, user is allowed to choose from among all available devices.
+  // Otherwise, this selects a specific device.
+  std::string opt_device_id;
 };
 
-typedef content::MediaStreamDeviceType MediaStreamType;
-
 // StreamDeviceInfo describes information about a device.
 struct CONTENT_EXPORT StreamDeviceInfo {
   static const int kNoId;
 
   StreamDeviceInfo();
   StreamDeviceInfo(MediaStreamType service_param,
                    const std::string& name_param,
                    const std::string& device_param,
                    bool opened);
   static bool IsEqual(const StreamDeviceInfo& first,
@@ skipping 10 matching lines @@
   bool in_use;
   // Id for this capture session. Unique for all sessions of the same type.
   int session_id;
 };
 
 typedef std::vector<StreamDeviceInfo> StreamDeviceInfoArray;
 
 }  // namespace media_stream
 
 #endif  // CONTENT_COMMON_MEDIA_MEDIA_STREAM_OPTIONS_H_