Add sent framerates to histogram stats:

webrtc/modules/video_coding/main/source/video_sender.cc

Index: webrtc/modules/video_coding/main/source/video_sender.cc
diff --git a/webrtc/modules/video_coding/main/source/video_sender.cc b/webrtc/modules/video_coding/main/source/video_sender.cc
index 9b855da16a4cfc6402795770a7205455cc4a69e6..5fc5041cf149ea20a328356e57f97290aebb6d28 100644
--- a/webrtc/modules/video_coding/main/source/video_sender.cc
+++ b/webrtc/modules/video_coding/main/source/video_sender.cc
@@ -20,6 +20,7 @@
 #include "webrtc/modules/video_coding/utility/include/quality_scaler.h"
 #include "webrtc/system_wrappers/interface/clock.h"
 #include "webrtc/system_wrappers/interface/logging.h"
+#include "webrtc/system_wrappers/interface/metrics.h"
 
 namespace webrtc {
 namespace vcm {
@@ -51,9 +52,28 @@ VideoSender::VideoSender(Clock* clock,
 }
 
 VideoSender::~VideoSender() {
+  UpdateHistograms();
   delete _sendCritSect;
 }
 
+void VideoSender::UpdateHistograms() {
+  int avg_encode_time_ms;
+  int max_encode_time_ms;
+  {
+    CriticalSectionScoped cs(_sendCritSect);
+    avg_encode_time_ms = stats_.AvgEncodeTimeMs();
+    max_encode_time_ms = stats_.MaxEncodeTimeMs();
+  }
+  if (avg_encode_time_ms != -1) {
+    RTC_HISTOGRAM_COUNTS_1000("WebRTC.Video.AvgEncodeTimeInMs",
+        avg_encode_time_ms);
+  }
+  if (max_encode_time_ms != -1) {
+    RTC_HISTOGRAM_COUNTS_1000("WebRTC.Video.MaxEncodeTimeInMs",
+        max_encode_time_ms);
+  }
+}
+
 int32_t VideoSender::Process() {
   int32_t returnValue = VCM_OK;
 
@@ -329,12 +349,15 @@ int32_t VideoSender::AddVideoFrame(const VideoFrame& videoFrame,
     CHECK(!converted_frame.IsZeroSize())
         << "Frame conversion failed, won't be able to encode frame.";
   }
+  int64_t encode_start_time_ms = clock_->TimeInMilliseconds();
   int32_t ret =
       _encoder->Encode(converted_frame, codecSpecificInfo, _nextFrameTypes);
   if (ret < 0) {
     LOG(LS_ERROR) << "Failed to encode frame. Error code: " << ret;
     return ret;
   }
+  stats_.Update(clock_->TimeInMilliseconds() - encode_start_time_ms);
+
   for (size_t i = 0; i < _nextFrameTypes.size(); ++i) {
     _nextFrameTypes[i] = kVideoFrameDelta;  // Default frame type.
   }
@@ -383,5 +406,11 @@ bool VideoSender::VideoSuspended() const {
   CriticalSectionScoped cs(_sendCritSect);
   return _mediaOpt.IsVideoSuspended();
 }
+
+void VideoSender::EncodedFrameStats::Update(int64_t encode_time_ms) {
+  sum_encode_time_ms += encode_time_ms;
+  max_encode_time_ms = std::max(max_encode_time_ms, encode_time_ms);
+  ++encoded_frames;
+}
 }  // namespace vcm
 }  // namespace webrtc