From 343f4144bee5ddde5efec1e1217403b444386cb4 Mon Sep 17 00:00:00 2001
From: Sebastian Jansson <srte@webrtc.org>
Date: Fri, 5 Oct 2018 19:44:46 +0200
Subject: [PATCH] Allows copy and assignment of field trial parameters.

Bug: webrtc:9346
Change-Id: I7734fbe60f95e554a636946cadc1940a78419951
Reviewed-on: https://webrtc-review.googlesource.com/c/104020
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25031}
---
 rtc_base/experiments/field_trial_parser.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/rtc_base/experiments/field_trial_parser.h b/rtc_base/experiments/field_trial_parser.h
index c743bb0145..22a8889717 100644
--- a/rtc_base/experiments/field_trial_parser.h
+++ b/rtc_base/experiments/field_trial_parser.h
@@ -37,6 +37,10 @@ class FieldTrialParameterInterface {
   virtual ~FieldTrialParameterInterface();
 
  protected:
+  // Protected to allow implementations to provide assignment and copy.
+  FieldTrialParameterInterface(const FieldTrialParameterInterface&) = default;
+  FieldTrialParameterInterface& operator=(const FieldTrialParameterInterface&) =
+      default;
   explicit FieldTrialParameterInterface(std::string key);
   friend void ParseFieldTrial(
       std::initializer_list<FieldTrialParameterInterface*> fields,
@@ -46,7 +50,7 @@ class FieldTrialParameterInterface {
   std::string Key() const;
 
  private:
-  const std::string key_;
+  std::string key_;
   bool used_ = false;
 };