1 files changed, 21 insertions, 0 deletions
diff --git a/chromium/weblayer/browser/weblayer_field_trials.cc b/chromium/weblayer/browser/weblayer_field_trials.cc
new file mode 100644
index 00000000000..8ba011f7f09
--- /dev/null
+++ b/chromium/weblayer/browser/weblayer_field_trials.cc
@@ -0,0 +1,21 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "weblayer/browser/weblayer_field_trials.h"
+
+#include "base/path_service.h"
+#include "components/metrics/persistent_histograms.h"
+#include "weblayer/common/weblayer_paths.h"
+
+namespace weblayer {
+
+void WebLayerFieldTrials::SetupFieldTrials() {
+  // Persistent histograms must be enabled as soon as possible.
+  base::FilePath metrics_dir;
+  if (base::PathService::Get(DIR_USER_DATA, &metrics_dir)) {
+    InstantiatePersistentHistograms(metrics_dir);
+  }
+}
+
+}  // namespace weblayer