Implement framesEncoded stat in video send ssrc stats.

webrtc/media/base/mediachannel.h

 /*
  *  Copyright (c) 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 647 matching lines @@
         nacks_rcvd(0),
         send_frame_width(0),
         send_frame_height(0),
         framerate_input(0),
         framerate_sent(0),
         nominal_bitrate(0),
         preferred_bitrate(0),
         adapt_reason(0),
         adapt_changes(0),
         avg_encode_ms(0),
-        encode_usage_percent(0) {
-  }
+        encode_usage_percent(0),
+        frames_encoded(0) {}
 
   std::vector<SsrcGroup> ssrc_groups;
   std::string encoder_implementation_name;
   int packets_cached;
   int firs_rcvd;
   int plis_rcvd;
   int nacks_rcvd;
   int send_frame_width;
   int send_frame_height;
   int framerate_input;
   int framerate_sent;
   int nominal_bitrate;
   int preferred_bitrate;
   int adapt_reason;
   int adapt_changes;
   int avg_encode_ms;
   int encode_usage_percent;
+  int frames_encoded;

[hbos, 2016/10/20 16:45:08]

Fix in this or a follow-up: In the linked spec this is "unsigned long", this is
WebIDL for uint32_t, not int.

[sakal, 2016/10/21 08:38:34]

Done.

 };
 
 struct VideoReceiverInfo : public MediaReceiverInfo {
   VideoReceiverInfo()
       : packets_concealed(0),
         firs_sent(0),
         plis_sent(0),
         nacks_sent(0),
         frame_width(0),
         frame_height(0),
@@ skipping 435 matching lines @@
   // Signal when the media channel is ready to send the stream. Arguments are:
   //     writable(bool)
   sigslot::signal1<bool> SignalReadyToSend;
   // Signal for notifying that the remote side has closed the DataChannel.
   sigslot::signal1<uint32_t> SignalStreamClosedRemotely;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_MEDIACHANNEL_H_