Add encode and decode time to histograms 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 33fc75e20d7bb72b8c6f61fe24162dddb37736f3..416c8dd5d8b868c917c6d2945e478244a021e092 100644
--- a/webrtc/video/end_to_end_tests.cc
+++ b/webrtc/video/end_to_end_tests.cc
@@ -1661,6 +1661,9 @@ 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.EncodeTimeInMs"));
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.DecodeTimeInMs"));
+
   EXPECT_EQ(1, test::NumHistogramSamples(
       "WebRTC.Video.BitrateSentInKbps"));
   EXPECT_EQ(1, test::NumHistogramSamples(