Add sent framerates to histogram stats:

webrtc/video/send_statistics_proxy.cc

Index: webrtc/video/send_statistics_proxy.cc
diff --git a/webrtc/video/send_statistics_proxy.cc b/webrtc/video/send_statistics_proxy.cc
index a6cb5b38e6bddd3d312f8c9b3d455acee9103cf6..c6f48e21a853a3b254a6eb0c92a43f39c04af930 100644
--- a/webrtc/video/send_statistics_proxy.cc
+++ b/webrtc/video/send_statistics_proxy.cc
@@ -16,6 +16,7 @@
 
 #include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/interface/logging.h"
+#include "webrtc/system_wrappers/interface/metrics.h"
 
 namespace webrtc {
 
@@ -23,11 +24,24 @@ const int SendStatisticsProxy::kStatsTimeoutMs = 5000;
 
 SendStatisticsProxy::SendStatisticsProxy(Clock* clock,
                                          const VideoSendStream::Config& config)
-    : clock_(clock),
-      config_(config) {
+    : clock_(clock), config_(config), last_sent_frame_timestamp_(0) {
 }
 
-SendStatisticsProxy::~SendStatisticsProxy() {}
+SendStatisticsProxy::~SendStatisticsProxy() {
+  UpdateHistograms();
+}
+
+void SendStatisticsProxy::UpdateHistograms() {
+  int input_fps =
+      static_cast<int>(input_frame_rate_tracker_total_.units_second());
+  int sent_fps =
+      static_cast<int>(sent_frame_rate_tracker_total_.units_second());
+
+  if (input_fps > 0)
+    RTC_HISTOGRAM_COUNTS_100("WebRTC.Video.InputFramesPerSecond", input_fps);
+  if (sent_fps > 0)
+    RTC_HISTOGRAM_COUNTS_100("WebRTC.Video.SentFramesPerSecond", sent_fps);
+}
 
 void SendStatisticsProxy::OutgoingRate(const int video_channel,
                                        const unsigned int framerate,
@@ -125,11 +139,16 @@ void SendStatisticsProxy::OnSendEncodedImage(
   stats->width = encoded_image._encodedWidth;
   stats->height = encoded_image._encodedHeight;
   update_times_[ssrc].resolution_update_ms = clock_->TimeInMilliseconds();
+  if (encoded_image._timeStamp != last_sent_frame_timestamp_) {
+    last_sent_frame_timestamp_ = encoded_image._timeStamp;
+    sent_frame_rate_tracker_total_.Update(1);
+  }
 }
 
 void SendStatisticsProxy::OnIncomingFrame() {
   rtc::CritScope lock(&crit_);
   input_frame_rate_tracker_.Update(1);
+  input_frame_rate_tracker_total_.Update(1);
 }
 
 void SendStatisticsProxy::RtcpPacketTypesCounterUpdated(