Rename some variables and methods in RTC event log.

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 e80772297997ce2b088404d8ff83395b71fab4f8..8f654f982bd71dbb11e6c3efdfc2e220d74b21fa 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log.proto
+++ b/webrtc/logging/rtc_event_log/rtc_event_log.proto
@@ -31,8 +31,8 @@ message Event {
     RTP_EVENT = 3;
     RTCP_EVENT = 4;
     AUDIO_PLAYOUT_EVENT = 5;
-    BWE_PACKET_LOSS_EVENT = 6;
-    BWE_PACKET_DELAY_EVENT = 7;
+    LOSS_BASED_BWE_UPDATE = 6;
+    DELAY_BASED_BWE_UPDATE = 7;
     VIDEO_RECEIVER_CONFIG_EVENT = 8;
     VIDEO_SENDER_CONFIG_EVENT = 9;
     AUDIO_RECEIVER_CONFIG_EVENT = 10;
@@ -52,8 +52,11 @@ message Event {
   // optional - but required if type == AUDIO_PLAYOUT_EVENT
   optional AudioPlayoutEvent audio_playout_event = 5;
 
-  // optional - but required if type == BWE_PACKET_LOSS_EVENT
-  optional BwePacketLossEvent bwe_packet_loss_event = 6;
+  // optional - but required if type == LOSS_BASED_BWE_UPDATE
+  optional LossBasedBweUpdate loss_based_bwe_update = 6;
+
+  // optional - but required if type == DELAY_BASED_BWE_UPDATE
+  optional DelayBasedBweUpdate delay_based_bwe_update = 7;
 
   // optional - but required if type == VIDEO_RECEIVER_CONFIG_EVENT
   optional VideoReceiveConfig video_receiver_config = 8;
@@ -103,9 +106,9 @@ message AudioPlayoutEvent {
   optional uint32 local_ssrc = 2;
 }
 
-message BwePacketLossEvent {
+message LossBasedBweUpdate {
   // required - Bandwidth estimate (in bps) after the update.
-  optional int32 bitrate = 1;
+  optional int32 bitrate_bps = 1;
 
   // required - Fraction of lost packets since last receiver report
   // computed as floor( 256 * (#lost_packets / #total_packets) ).
@@ -117,6 +120,20 @@ message BwePacketLossEvent {
   optional int32 total_packets = 3;
 }
 
+message DelayBasedBweUpdate {
+  enum DetectorState {
+    BWE_NORMAL = 0;
+    BWE_UNDERUSING = 1;
+    BWE_OVERUSING = 2;
+  }
+
+  // required - Bandwidth estimate (in bps) after the update.
+  optional int32 bitrate_bps = 1;
+
+  // required - The state of the overuse detector.
+  optional DetectorState detector_state = 2;
+}
+
 // TODO(terelius): Video and audio streams could in principle share SSRC,
 // so identifying a stream based only on SSRC might not work.
 // It might be better to use a combination of SSRC and media type
@@ -251,4 +268,4 @@ message AudioNetworkAdaptation {
 
   // Number of audio channels that each encoded packet consists of.
   optional uint32 num_channels = 6;
-}
+}