Only update codec type histogram if lifetime is long enough (10 sec).

webrtc/video/send_statistics_proxy_unittest.cc

Index: webrtc/video/send_statistics_proxy_unittest.cc
diff --git a/webrtc/video/send_statistics_proxy_unittest.cc b/webrtc/video/send_statistics_proxy_unittest.cc
index 2bf038d2c437ce11a6d90a427ae274a0a4533f2a..34344d219c936f002aaa1598437d06c2167f4691 100644
--- a/webrtc/video/send_statistics_proxy_unittest.cc
+++ b/webrtc/video/send_statistics_proxy_unittest.cc
@@ -302,6 +302,21 @@ TEST_F(SendStatisticsProxyTest, SwitchContentTypeUpdatesHistograms) {
   EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.InputWidthInPixels"));
 }
 
+TEST_F(SendStatisticsProxyTest, LifetimeHistogramIsUpdated) {
+  const int64_t kTimeSec = 3;
+  fake_clock_.AdvanceTimeMilliseconds(kTimeSec * 1000);
+  statistics_proxy_.reset();
+  EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.SendStreamLifetimeInSeconds"));
+  EXPECT_EQ(1, metrics::NumEvents("WebRTC.Video.SendStreamLifetimeInSeconds",
+                                  kTimeSec));
+}
+
+TEST_F(SendStatisticsProxyTest, CodecTypeHistogramIsUpdated) {
+  fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000);
+  statistics_proxy_.reset();
+  EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.Encoder.CodecType"));
+}
+
 TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_Vp8) {
   EncodedImage encoded_image;
   CodecSpecificInfo codec_info;