Remove dead code related to media device enumerations and monitoring.

content/common/media/media_stream_options.cc

Index: content/common/media/media_stream_options.cc
diff --git a/content/common/media/media_stream_options.cc b/content/common/media/media_stream_options.cc
index 2a4c166ff5c9b549daedfb7884c99b9b1d9e1efc..ba390927fba335ed4c9cd8379d97887f0ad7ed4b 100644
--- a/content/common/media/media_stream_options.cc
+++ b/content/common/media/media_stream_options.cc
@@ -45,28 +45,18 @@ StreamDeviceInfo::StreamDeviceInfo()
 
 StreamDeviceInfo::StreamDeviceInfo(MediaStreamType service_param,
                                    const std::string& name_param,
-                                   const std::string& device_param,
-                                   const std::string& group_param)
-    : device(service_param, device_param, name_param, group_param),
-      session_id(kNoId) {}
-
-StreamDeviceInfo::StreamDeviceInfo(MediaStreamType service_param,
-                                   const std::string& name_param,
                                    const std::string& device_param)
-    : StreamDeviceInfo(service_param, name_param, device_param, std::string()) {
-}
+    : device(service_param, device_param, name_param), session_id(kNoId) {}
 
 StreamDeviceInfo::StreamDeviceInfo(MediaStreamType service_param,
                                    const std::string& name_param,
                                    const std::string& device_param,
-                                   const std::string& group_param,
                                    int sample_rate,
                                    int channel_layout,
                                    int frames_per_buffer)
     : device(service_param,
              device_param,
              name_param,
-             group_param,
              sample_rate,
              channel_layout,
              frames_per_buffer),