Add histogram stats for jitter buffer delay and target delay for received video streams:

webrtc/video/end_to_end_tests.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include <algorithm>
@@ skipping 2135 matching lines @@
   EXPECT_EQ(static_cast<int>(video_encoder_config_.streams[0].height),
             test::LastHistogramSample("WebRTC.Video.ReceivedHeightInPixels"));
 
   EXPECT_EQ(1,
             test::NumHistogramSamples(video_prefix + "InputFramesPerSecond"));
   EXPECT_EQ(1, test::NumHistogramSamples(video_prefix + "SentFramesPerSecond"));
   EXPECT_EQ(1, test::NumHistogramSamples(
       "WebRTC.Video.DecodedFramesPerSecond"));
   EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.RenderFramesPerSecond"));
 
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.JitterBufferDelayInMs"));
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.TargetDelayInMs"));
+  EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.CurrentDelayInMs"));
   EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.OnewayDelayInMs"));
   EXPECT_EQ(
       1, test::NumHistogramSamples("WebRTC.Video.RenderSqrtPixelsPerSecond"));
 
   EXPECT_EQ(1, test::NumHistogramSamples(video_prefix + "EncodeTimeInMs"));
   EXPECT_EQ(1, test::NumHistogramSamples("WebRTC.Video.DecodeTimeInMs"));
 
   EXPECT_EQ(1, test::NumHistogramSamples(video_prefix + "BitrateSentInKbps"));
   EXPECT_EQ(1, test::NumHistogramSamples(
       "WebRTC.Video.BitrateReceivedInKbps"));
@@ skipping 1338 matching lines @@
    private:
     bool video_observed_;
     bool audio_observed_;
     SequenceNumberUnwrapper unwrapper_;
     std::set<int64_t> received_packet_ids_;
   } test;
 
   RunBaseTest(&test);
 }
 }  // namespace webrtc