From 86873f0cd3754e21818fe53d0bc60c3d48813db3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Terelius?= <terelius@webrtc.org>
Date: Wed, 18 Sep 2019 13:37:30 +0200
Subject: [PATCH] Improve field trial error message.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Bug: None
Change-Id: I112cda6fead3d68136fd7be551686e40191fa87f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153482
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29235}
---
 rtc_base/experiments/field_trial_parser.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rtc_base/experiments/field_trial_parser.cc b/rtc_base/experiments/field_trial_parser.cc
index 5f33b6eff8..b88d0f97c4 100644
--- a/rtc_base/experiments/field_trial_parser.cc
+++ b/rtc_base/experiments/field_trial_parser.cc
@@ -86,6 +86,12 @@ void ParseFieldTrial(
     } else {
       RTC_LOG(LS_INFO) << "No field with key: '" << key
                        << "' (found in trial: \"" << trial_string << "\")";
+      std::string valid_keys;
+      for (const auto& f : field_map) {
+        valid_keys += f.first;
+        valid_keys += ", ";
+      }
+      RTC_LOG(LS_INFO) << "Valid keys are: " << valid_keys;
     }
   }