Rename RTC_HISTOGRAM_* macros to RTC_HISTOGRAM_*_SPARSE_* to indicate that these are for infrequent

webrtc/video/vie_receiver.cc

Index: webrtc/video/vie_receiver.cc
diff --git a/webrtc/video/vie_receiver.cc b/webrtc/video/vie_receiver.cc
index 98c8c5dbc09dfb50fd891e7528bff1e2d2ca42a2..4fb706c76450fba3ec65c1a3b2662b575353d4e8 100644
--- a/webrtc/video/vie_receiver.cc
+++ b/webrtc/video/vie_receiver.cc
@@ -68,14 +68,15 @@ ViEReceiver::~ViEReceiver() {
 void ViEReceiver::UpdateHistograms() {
   FecPacketCounter counter = fec_receiver_->GetPacketCounter();
   if (counter.num_packets > 0) {
-    RTC_HISTOGRAM_PERCENTAGE(
+    RTC_HISTOGRAM_PERCENTAGE_SPARSE(
         "WebRTC.Video.ReceivedFecPacketsInPercent",
         static_cast<int>(counter.num_fec_packets * 100 / counter.num_packets));
   }
   if (counter.num_fec_packets > 0) {
-    RTC_HISTOGRAM_PERCENTAGE("WebRTC.Video.RecoveredMediaPacketsInPercentOfFec",
-                             static_cast<int>(counter.num_recovered_packets *
-                                              100 / counter.num_fec_packets));
+    RTC_HISTOGRAM_PERCENTAGE_SPARSE(
+        "WebRTC.Video.RecoveredMediaPacketsInPercentOfFec",
+        static_cast<int>(counter.num_recovered_packets * 100 /
+                         counter.num_fec_packets));
   }
 }