Media Related changes for TabCapture API

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 524bc203f87f44c647a380e7c7461b4576d5308f..c6d77f9b811b514acd213663b34bf947116a159b 100644
--- a/content/common/media/media_stream_options.cc
+++ b/content/common/media/media_stream_options.cc
@@ -8,6 +8,10 @@
 
 namespace media_stream {
 
+const char kMediaStreamSource[] = "chromeMediaSource";
+const char kMediaStreamSourceId[] = "chromeMediaSourceId";
+const char kMediaStreamSourceTab[] = "tab";
+
 StreamOptions::StreamOptions()
     : audio_type(content::MEDIA_NO_SERVICE),
       video_type(content::MEDIA_NO_SERVICE) {}
@@ -29,6 +33,16 @@ StreamOptions::StreamOptions(MediaStreamType audio_type,
          video_type == content::MEDIA_NO_SERVICE);
 }
 
+StreamOptions::StreamOptions(MediaStreamType audio_type,
+                             std::string audio_device_id,
+                             MediaStreamType video_type,
+                             std::string video_device_id)
+    : audio_type(audio_type),
+      audio_device_id(audio_device_id),
+      video_type(video_type),
+      video_device_id(video_device_id) {
+}
+
 // static
 const int StreamDeviceInfo::kNoId = -1;