Implement googContentType GetStats metric reported on receive side.

webrtc/video/receive_statistics_proxy_unittest.cc

 /*
  *  Copyright 2016 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.
  */
 
@@ skipping 80 matching lines @@
   EXPECT_EQ(rtc::Optional<uint64_t>(), statistics_proxy_->GetStats().qp_sum);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
                                     VideoContentType::UNSPECIFIED);
   EXPECT_EQ(rtc::Optional<uint64_t>(3u), statistics_proxy_->GetStats().qp_sum);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(127u),
                                     VideoContentType::UNSPECIFIED);
   EXPECT_EQ(rtc::Optional<uint64_t>(130u),
             statistics_proxy_->GetStats().qp_sum);
 }
 
+TEST_F(ReceiveStatisticsProxyTest, ReportsContentType) {
+  const std::string kRealtimeString("realtime");
+  const std::string kScreenshareString("screen");
+  EXPECT_EQ(kRealtimeString, videocontenttypehelpers::ToString(
+                            statistics_proxy_->GetStats().content_type));
+  statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
+                                    VideoContentType::SCREENSHARE);
+  EXPECT_EQ(kScreenshareString, videocontenttypehelpers::ToString(
+                          statistics_proxy_->GetStats().content_type));
+  statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
+                                    VideoContentType::UNSPECIFIED);
+  EXPECT_EQ(kRealtimeString, videocontenttypehelpers::ToString(
+                            statistics_proxy_->GetStats().content_type));
+}
+
 TEST_F(ReceiveStatisticsProxyTest, ReportsMaxInterframeDelay) {
   const int64_t kInterframeDelayMs1 = 100;
   const int64_t kInterframeDelayMs2 = 200;
   const int64_t kInterframeDelayMs3 = 100;
   EXPECT_EQ(-1, statistics_proxy_->GetStats().interframe_delay_max_ms);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
                                     VideoContentType::UNSPECIFIED);
   EXPECT_EQ(-1, statistics_proxy_->GetStats().interframe_delay_max_ms);
 
   fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs1);
@@ skipping 837 matching lines @@
               metrics::MinSample("WebRTC.Video.InterframeDelayInMs"));
     EXPECT_EQ(kInterFrameDelayMs2,
               metrics::MinSample("WebRTC.Video.InterframeDelayMaxInMs"));
     EXPECT_EQ((kInterFrameDelayMs1 + kInterFrameDelayMs2) / 2,
               metrics::MinSample(
                   "WebRTC.Video.InterframeDelayInMs.ExperimentGroup0"));
   }
 }
 
 }  // namespace webrtc