Add probe logging to RtcEventLog.

webrtc/logging/rtc_event_log/rtc_event_log.proto

Index: webrtc/logging/rtc_event_log/rtc_event_log.proto
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log.proto b/webrtc/logging/rtc_event_log/rtc_event_log.proto
index 21f642235bfb64feb9906db697bbace65c7f91e7..26d55a7c167dcb7c1935d36135d296b45fe7e74a 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log.proto
+++ b/webrtc/logging/rtc_event_log/rtc_event_log.proto
@@ -38,6 +38,8 @@ message Event {
     AUDIO_RECEIVER_CONFIG_EVENT = 10;
     AUDIO_SENDER_CONFIG_EVENT = 11;
     AUDIO_NETWORK_ADAPTATION_EVENT = 16;
+    BWE_PROBE_CLUSTER_CREATED_EVENT = 17;
+    BWE_PROBE_RESULT_EVENT = 18;
   }
 
   // required - Indicates the type of this event
@@ -72,6 +74,12 @@ message Event {
 
   // optional - but required if type == AUDIO_NETWORK_ADAPTATION_EVENT
   optional AudioNetworkAdaptation audio_network_adaptation = 16;
+
+  // optional - but required if type == BWE_PROBE_CLUSTER_CREATED_EVENT
+  optional BweProbeCluster probe_cluster = 17;
+
+  // optional - but required if type == BWE_PROBE_RESULT_EVENT
+  optional BweProbeResult probe_result = 18;
 }
 
 message RtpPacket {
@@ -87,6 +95,9 @@ message RtpPacket {
   // required - The RTP header only.
   optional bytes header = 4;
 
+  // optional - The probe cluster id.
+  optional uint32 probe_cluster_id = 5;
+
   // Do not add code to log user payload data without a privacy review!
 }
 
@@ -271,3 +282,35 @@ message AudioNetworkAdaptation {
   // Number of audio channels that each encoded packet consists of.
   optional uint32 num_channels = 6;
 }
+
+message BweProbeCluster {
+  // required - The id of this probe cluster.
+  optional uint32 id = 1;
+
+  // required - The bitrate in bps that this probe cluster is meant to probe.
+  optional uint64 bitrate_bps = 2;
+
+  // required - The minimum number of packets used to probe the given bitrate.
+  optional uint32 min_packets = 3;
+
+  // required - The minimum number of bytes used to probe the given bitrate.
+  optional uint32 min_bytes = 4;
+}
+
+message BweProbeResult {
+  // required - The id of this probe cluster.
+  optional uint32 id = 1;
+
+  enum ResultType {
+    SUCCESS = 0;
+    INVALID_SEND_RECEIVE_INTERVAL = 1;
+    INVALID_SEND_RECEIVE_RATIO = 2;
+    TIMEOUT = 3;
+  }
+
+  // required - The result of this probing attempt.
+  optional ResultType result = 2;
+
+  // optional - but required if result == SUCCESS. The resulting bitrate in bps.
+  optional uint64 bitrate_bps = 3;
+}