1 files changed, 39 insertions, 0 deletions
diff --git a/third_party/libwebrtc/test/field_trial.cc b/third_party/libwebrtc/test/field_trial.cc
new file mode 100644
index 0000000000..3d6c6ac617
--- /dev/null
+++ b/third_party/libwebrtc/test/field_trial.cc
@@ -0,0 +1,39 @@
+/*
+ *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "test/field_trial.h"
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/checks.h"
+#include "system_wrappers/include/field_trial.h"
+
+namespace webrtc {
+namespace test {
+
+ScopedFieldTrials::ScopedFieldTrials(absl::string_view config)
+    : current_field_trials_(config),
+      previous_field_trials_(webrtc::field_trial::GetFieldTrialString()) {
+  RTC_CHECK(webrtc::field_trial::FieldTrialsStringIsValid(
+      current_field_trials_.c_str()))
+      << "Invalid field trials string: " << current_field_trials_;
+  webrtc::field_trial::InitFieldTrialsFromString(current_field_trials_.c_str());
+}
+
+ScopedFieldTrials::~ScopedFieldTrials() {
+  RTC_CHECK(
+      webrtc::field_trial::FieldTrialsStringIsValid(previous_field_trials_))
+      << "Invalid field trials string: " << previous_field_trials_;
+  webrtc::field_trial::InitFieldTrialsFromString(previous_field_trials_);
+}
+
+}  // namespace test
+}  // namespace webrtc