1 files changed, 49 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/field_trials_view.h b/third_party/libwebrtc/api/field_trials_view.h
new file mode 100644
index 0000000000..45e6f7899b
--- /dev/null
+++ b/third_party/libwebrtc/api/field_trials_view.h
@@ -0,0 +1,49 @@
+/*
+ *  Copyright 2019 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.
+ */
+#ifndef API_FIELD_TRIALS_VIEW_H_
+#define API_FIELD_TRIALS_VIEW_H_
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// An interface that provides the means to access field trials.
+//
+// Note that there are no guarantess that the meaning of a particular key-value
+// mapping will be preserved over time and no announcements will be made if they
+// are changed. It's up to the library user to ensure that the behavior does not
+// break.
+class RTC_EXPORT FieldTrialsView {
+ public:
+  virtual ~FieldTrialsView() = default;
+
+  // Returns the configured value for `key` or an empty string if the field
+  // trial isn't configured.
+  virtual std::string Lookup(absl::string_view key) const = 0;
+
+  bool IsEnabled(absl::string_view key) const {
+    return Lookup(key).find("Enabled") == 0;
+  }
+
+  bool IsDisabled(absl::string_view key) const {
+    return Lookup(key).find("Disabled") == 0;
+  }
+};
+
+// TODO(bugs.webrtc.org/10335): Remove once all migrated to
+// api/field_trials_view.h
+typedef FieldTrialsView WebRtcKeyValueConfig;
+
+}  // namespace webrtc
+
+#endif  // API_FIELD_TRIALS_VIEW_H_