Adds support for sending redundant payloads over RTX.

TEST=trybots
BUG=1812
R=mflodman@webrtc.org, pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/4169004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5209 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc.gyp b/webrtc.gyp
index a223007..03a7b69 100644
--- a/webrtc.gyp
+++ b/webrtc.gyp
@@ -63,6 +63,7 @@
         'call.h',
         'config.cc',
         'config.h',
+        'experiments.h',
         'frame_callback.h',
         'transport.h',
         'video_receive_stream.h',