From 5481784385e4af0cef2df63bf9aa68ba0c45ccf7 Mon Sep 17 00:00:00 2001
From: Bjorn Terelius <terelius@webrtc.org>
Date: Mon, 2 Nov 2020 15:13:12 +0100
Subject: [PATCH] Add kill-switch to RTC event log factory.
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Bug: webrtc:12084
Change-Id: Iac2c05b59a20e272fe302a5580357f6f141dc328
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/190983
Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org>
Reviewed-by: Elad Alon <eladalon@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32558}
---
 api/rtc_event_log/BUILD.gn                 | 1 +
 api/rtc_event_log/rtc_event_log_factory.cc | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/api/rtc_event_log/BUILD.gn b/api/rtc_event_log/BUILD.gn
index e853058e25..158dc06a7b 100644
--- a/api/rtc_event_log/BUILD.gn
+++ b/api/rtc_event_log/BUILD.gn
@@ -37,6 +37,7 @@ rtc_library("rtc_event_log_factory") {
     ":rtc_event_log",
     "../../rtc_base:checks",
     "../../rtc_base/system:rtc_export",
+    "../../system_wrappers:field_trial",
     "../task_queue",
   ]
 
diff --git a/api/rtc_event_log/rtc_event_log_factory.cc b/api/rtc_event_log/rtc_event_log_factory.cc
index 2013584399..fdf267b7ba 100644
--- a/api/rtc_event_log/rtc_event_log_factory.cc
+++ b/api/rtc_event_log/rtc_event_log_factory.cc
@@ -14,6 +14,7 @@
 #include <utility>
 
 #include "rtc_base/checks.h"
+#include "system_wrappers/include/field_trial.h"
 
 #ifdef WEBRTC_ENABLE_RTC_EVENT_LOG
 #include "logging/rtc_event_log/rtc_event_log_impl.h"
@@ -29,6 +30,9 @@ RtcEventLogFactory::RtcEventLogFactory(TaskQueueFactory* task_queue_factory)
 std::unique_ptr<RtcEventLog> RtcEventLogFactory::CreateRtcEventLog(
     RtcEventLog::EncodingType encoding_type) {
 #ifdef WEBRTC_ENABLE_RTC_EVENT_LOG
+  if (field_trial::IsEnabled("WebRTC-RtcEventLogKillSwitch")) {
+    return std::make_unique<RtcEventLogNull>();
+  }
   return std::make_unique<RtcEventLogImpl>(encoding_type, task_queue_factory_);
 #else
   return std::make_unique<RtcEventLogNull>();