Add limit for minimum number of required samples before recording input and sent framerate stats.

webrtc/video/end_to_end_tests.cc

Index: webrtc/video/end_to_end_tests.cc
diff --git a/webrtc/video/end_to_end_tests.cc b/webrtc/video/end_to_end_tests.cc
index 2c89ab2ddf4500559774622298c0c4038ea675c7..c889f68ad9c8cae2f107b07cee60d59806ba9ba8 100644
--- a/webrtc/video/end_to_end_tests.cc
+++ b/webrtc/video/end_to_end_tests.cc
@@ -1994,6 +1994,10 @@ void EndToEndTest::VerifyHistogramStats(bool use_rtx, bool use_red) {
       "WebRTC.Video.DecodedFramesPerSecond"));
   EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.RenderFramesPerSecond"));
 
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.OnewayDelayInMs"));
+  EXPECT_EQ(
+      1, test::NumHistogramSamples("WebRTC.Video.RenderSqrtPixelsPerSecond"));
+
   EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.EncodeTimeInMs"));
   EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.DecodeTimeInMs"));
 
@@ -2014,6 +2018,9 @@ void EndToEndTest::VerifyHistogramStats(bool use_rtx, bool use_red) {
   EXPECT_EQ(1, test::NumHistogramSamples(
       "WebRTC.Video.RetransmittedBitrateReceivedInKbps"));
 
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.SendSideDelayInMs"));
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.SendSideDelayMaxInMs"));
+
   int num_rtx_samples = use_rtx ? 1 : 0;
   EXPECT_EQ(num_rtx_samples, test::NumHistogramSamples(
       "WebRTC.Video.RtxBitrateSentInKbps"));