RTCMediaStreamTrackStats.framesDropped collected by RTCStatsCollector.

webrtc/video/receive_statistics_proxy_unittest.cc

Index: webrtc/video/receive_statistics_proxy_unittest.cc
diff --git a/webrtc/video/receive_statistics_proxy_unittest.cc b/webrtc/video/receive_statistics_proxy_unittest.cc
index a485edae022b6db34d96ed370472fd0965c73c94..d431bc4afbcacb72e68f765e6564546ede02980a 100644
--- a/webrtc/video/receive_statistics_proxy_unittest.cc
+++ b/webrtc/video/receive_statistics_proxy_unittest.cc
@@ -12,6 +12,8 @@
 
 #include <memory>
 
+#include "webrtc/api/video/video_frame.h"
+#include "webrtc/api/video/video_rotation.h"
 #include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/system_wrappers/include/metrics.h"
 #include "webrtc/system_wrappers/include/metrics_default.h"
@@ -57,6 +59,16 @@ TEST_F(ReceiveStatisticsProxyTest, OnDecodedFrameIncreasesFramesDecoded) {
   }
 }
 
+TEST_F(ReceiveStatisticsProxyTest, OnRenderedFrameIncreasesFramesRendered) {
+  EXPECT_EQ(0u, statistics_proxy_->GetStats().frames_rendered);
+  webrtc::VideoFrame frame(
+      webrtc::I420Buffer::Create(1, 1), 0, 0, webrtc::kVideoRotation_0);
+  for (uint32_t i = 1; i <= 3; ++i) {
+    statistics_proxy_->OnRenderedFrame(frame);
+    EXPECT_EQ(i, statistics_proxy_->GetStats().frames_rendered);
+  }
+}
+
 TEST_F(ReceiveStatisticsProxyTest, GetStatsReportsSsrc) {
   EXPECT_EQ(kRemoteSsrc, statistics_proxy_->GetStats().ssrc);
 }