Add separate send-side UMA stats for screenshare and video.

webrtc/video/send_statistics_proxy.h

Index: webrtc/video/send_statistics_proxy.h
diff --git a/webrtc/video/send_statistics_proxy.h b/webrtc/video/send_statistics_proxy.h
index 7209094fe68a70342de60992ea2acc6e4528ef47..a2b840eff61d05d6e85a11516de463b26735d10e 100644
--- a/webrtc/video/send_statistics_proxy.h
+++ b/webrtc/video/send_statistics_proxy.h
@@ -38,7 +38,9 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
  public:
   static const int kStatsTimeoutMs;
 
-  SendStatisticsProxy(Clock* clock, const VideoSendStream::Config& config);
+  SendStatisticsProxy(Clock* clock,
+                      const VideoSendStream::Config& config,
+                      VideoEncoderConfig::ContentType content_type);
   virtual ~SendStatisticsProxy();
 
   VideoSendStream::Stats GetStats();
@@ -58,6 +60,10 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
   void OnSuspendChange(bool is_suspended);
   void OnInactiveSsrc(uint32_t ssrc);
 
+  // Used to indicate change in content type, which may require a change in
+  // how stats are collected.
+  void SetContentType(VideoEncoderConfig::ContentType content_type);
+
  protected:
   // From CpuOveruseMetricsObserver.
   void CpuOveruseMetricsUpdated(const CpuOveruseMetrics& metrics) override;
@@ -112,38 +118,51 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
     int num_samples;
   };
   struct StatsUpdateTimes {
-    StatsUpdateTimes() : resolution_update_ms(0) {}
+    StatsUpdateTimes() : resolution_update_ms(0), bitrate_update_ms(0) {}
     int64_t resolution_update_ms;
     int64_t bitrate_update_ms;
   };
   void PurgeOldStats() EXCLUSIVE_LOCKS_REQUIRED(crit_);
   VideoSendStream::StreamStats* GetStatsEntry(uint32_t ssrc)
       EXCLUSIVE_LOCKS_REQUIRED(crit_);
-  void UpdateHistograms() EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
   Clock* const clock_;
   const VideoSendStream::Config config_;
   mutable rtc::CriticalSection crit_;
+  VideoEncoderConfig::ContentType content_type_ GUARDED_BY(crit_);
   VideoSendStream::Stats stats_ GUARDED_BY(crit_);
-  rtc::RateTracker input_frame_rate_tracker_ GUARDED_BY(crit_);
-  rtc::RateTracker sent_frame_rate_tracker_ GUARDED_BY(crit_);
   uint32_t last_sent_frame_timestamp_ GUARDED_BY(crit_);
   std::map<uint32_t, StatsUpdateTimes> update_times_ GUARDED_BY(crit_);
 
-  int max_sent_width_per_timestamp_ GUARDED_BY(crit_);
-  int max_sent_height_per_timestamp_ GUARDED_BY(crit_);
-  SampleCounter input_width_counter_ GUARDED_BY(crit_);
-  SampleCounter input_height_counter_ GUARDED_BY(crit_);
-  SampleCounter sent_width_counter_ GUARDED_BY(crit_);
-  SampleCounter sent_height_counter_ GUARDED_BY(crit_);
-  SampleCounter encode_time_counter_ GUARDED_BY(crit_);
-  BoolSampleCounter key_frame_counter_ GUARDED_BY(crit_);
-  BoolSampleCounter quality_limited_frame_counter_ GUARDED_BY(crit_);
-  SampleCounter quality_downscales_counter_ GUARDED_BY(crit_);
-  BoolSampleCounter bw_limited_frame_counter_ GUARDED_BY(crit_);
-  SampleCounter bw_resolutions_disabled_counter_ GUARDED_BY(crit_);
-  SampleCounter delay_counter_ GUARDED_BY(crit_);
-  SampleCounter max_delay_counter_ GUARDED_BY(crit_);
+  // Contains stats used for UMA histograms. These stats will be reset if
+  // content type changes between real-time video and screenshare, since these
+  // will be reported separately.
+  struct UmaSamplesContainer {
+    explicit UmaSamplesContainer(const char* prefix);
+    ~UmaSamplesContainer();
+
+    void UpdateHistograms();
+
+    const std::string uma_prefix_;
+    int max_sent_width_per_timestamp_;
+    int max_sent_height_per_timestamp_;
+    SampleCounter input_width_counter_;
+    SampleCounter input_height_counter_;
+    SampleCounter sent_width_counter_;
+    SampleCounter sent_height_counter_;
+    SampleCounter encode_time_counter_;
+    BoolSampleCounter key_frame_counter_;
+    BoolSampleCounter quality_limited_frame_counter_;
+    SampleCounter quality_downscales_counter_;
+    BoolSampleCounter bw_limited_frame_counter_;
+    SampleCounter bw_resolutions_disabled_counter_;
+    SampleCounter delay_counter_;
+    SampleCounter max_delay_counter_;
+    rtc::RateTracker input_frame_rate_tracker_;
+    rtc::RateTracker sent_frame_rate_tracker_;
+  };
+
+  rtc::scoped_ptr<UmaSamplesContainer> uma_container_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc