Adding stub files for RtpSender/RtpReceiver.

talk/app/webrtc/rtpreceiverinterface.h

Index: talk/app/webrtc/rtpreceiverinterface.h
diff --git a/talk/media/base/voiceprocessor.h b/talk/app/webrtc/rtpreceiverinterface.h
old mode 100755
new mode 100644
similarity index 91%
copy from talk/media/base/voiceprocessor.h
copy to talk/app/webrtc/rtpreceiverinterface.h
index 8de2678c957d1e5becab67ddc5548f56dee68b5d..aee77e173c9c438fed345afcd68adc0e7331e955
--- a/talk/media/base/voiceprocessor.h
+++ b/talk/app/webrtc/rtpreceiverinterface.h
@@ -1,6 +1,6 @@
 /*
  * libjingle
- * Copyright 2004 Google Inc.
+ * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -25,5 +25,4 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// TODO(solenberg): Remove this file once Chromium's libjingle.gyp/.gn are
-//                  updated.
+// This file is currently stubbed so that Chromium's build files can be updated.