Let Contraints Controll Mute/Unmute Audio Local Playback For Desktop Sharing

content/public/common/media_stream_request.h

Index: content/public/common/media_stream_request.h
diff --git a/content/public/common/media_stream_request.h b/content/public/common/media_stream_request.h
index c24b1bf72a25c61babcf31941d9fc73da523c4ff..cefb236672aada81445c5b25301317de3264ad6a 100644
--- a/content/public/common/media_stream_request.h
+++ b/content/public/common/media_stream_request.h
@@ -195,17 +195,17 @@ typedef std::map<MediaStreamType, MediaStreamDevices> MediaStreamDeviceMap;
 // Tab-only stuff and Pepper-only stuff being passed around to all clients,
 // which is icky.
 struct CONTENT_EXPORT MediaStreamRequest {
-  MediaStreamRequest(
-      int render_process_id,
-      int render_frame_id,
-      int page_request_id,
-      const GURL& security_origin,
-      bool user_gesture,
-      MediaStreamRequestType request_type,
-      const std::string& requested_audio_device_id,
-      const std::string& requested_video_device_id,
-      MediaStreamType audio_type,
-      MediaStreamType video_type);
+  MediaStreamRequest(int render_process_id,
+                     int render_frame_id,
+                     int page_request_id,
+                     const GURL& security_origin,
+                     bool user_gesture,
+                     MediaStreamRequestType request_type,
+                     const std::string& requested_audio_device_id,
+                     const std::string& requested_video_device_id,
+                     MediaStreamType audio_type,
+                     MediaStreamType video_type,
+                     bool mute_source);

[miu, 2016/09/07 21:10:03]

Since the mute option is a part of the device ID, do we need the extra "bool
mute_source" here?

[qiangchen, 2016/09/09 18:45:24]

Ditto.

 
   MediaStreamRequest(const MediaStreamRequest& other);
 
@@ -247,6 +247,10 @@ struct CONTENT_EXPORT MediaStreamRequest {
   // Flag to indicate if the request contains video.
   MediaStreamType video_type;
 
+  // Flag for desktop share to indicate whether to mute the source audio during
+  // sharing.
+  bool mute_source;
+
   // True if all ancestors of the requesting frame have the same origin.
   bool all_ancestors_have_same_origin;
 };