Replace RingBuffer by std::deque in RtcEventLog.

webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc

Index: webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc b/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
index 04186a7c581d1550bbc8b80c139969f85e7df74a..b7d02726bb90d7981872a416e69ab746cf2076e2 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
+++ b/webrtc/logging/rtc_event_log/rtc_event_log_helper_thread.cc
@@ -38,7 +38,7 @@ RtcEventLogHelperThread::RtcEventLogHelperThread(
     SwapQueue<std::unique_ptr<rtclog::Event>>* event_queue)
     : message_queue_(message_queue),
       event_queue_(event_queue),
-      history_(kEventsInHistory),
+      history_(),

[tommi, 2017/06/01 21:29:43]

Nit: might as well just remove from the list

       config_history_(),
       file_(FileWrapper::Create()),
       thread_(&ThreadOutputFunction, this, "RtcEventLog thread"),
@@ -120,6 +120,8 @@ bool RtcEventLogHelperThread::LogToMemory() {
       config_history_.push_back(std::move(most_recent_event_));
     } else {
       history_.push_back(std::move(most_recent_event_));
+      if (history_.size() > kEventsInHistory)
+        history_.pop_front();
     }
     has_recent_event_ = event_queue_->Remove(&most_recent_event_);
     message_received = true;