Add histogram for percentage of sent frames that are limited in resolution due to quality.

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 60d962f93b3a1cdf541868fab929001fdce7d801..5a266e7010a6de2b5ccf323d3676ceb751a976bc 100644
--- a/webrtc/video/send_statistics_proxy.h
+++ b/webrtc/video/send_statistics_proxy.h
@@ -102,6 +102,15 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
     int sum;
     int num_samples;
   };
+  struct BoolSampleCounter {

[stefan-webrtc, 2015/09/16 07:36:57]

I'd prefer this to be a class I think. Same with SampleCounter above.

[åsapersson, 2015/09/17 14:24:45]

Done in another cl (bw limited stats cl).

+    BoolSampleCounter() : sum(0), num_samples(0) {}
+    void Add(bool sample);
+    int Percent(int min_required_samples) const;
+
+   private:
+    int sum;
+    int num_samples;
+  };
   struct StatsUpdateTimes {
     StatsUpdateTimes() : resolution_update_ms(0) {}
     int64_t resolution_update_ms;
@@ -129,6 +138,7 @@ class SendStatisticsProxy : public CpuOveruseMetricsObserver,
   SampleCounter sent_width_counter_ GUARDED_BY(crit_);
   SampleCounter sent_height_counter_ GUARDED_BY(crit_);
   SampleCounter encode_time_counter_ GUARDED_BY(crit_);
+  BoolSampleCounter quality_limited_sent_frame_counter_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc