1 files changed, 40 insertions, 0 deletions
diff --git a/dom/base/UseCounterMetrics.h b/dom/base/UseCounterMetrics.h
new file mode 100644
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+++ b/dom/base/UseCounterMetrics.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef UseCounterMetrics_h_
+#define UseCounterMetrics_h_
+
+#include "stdint.h"
+
+namespace mozilla {
+enum UseCounter : int16_t;
+enum class UseCounterWorker : int16_t;
+
+namespace dom {
+enum WorkerKind : uint8_t;
+
+/**
+ * Increments the metric associated with the specific use counter.
+ *
+ * @param aUseCounter - The use counter for the feature that was used.
+ * @param aIsPage - Whether we should record to the page or document metric.
+ * @returns The name of the metric that was incremented, or "".
+ */
+const char* IncrementUseCounter(UseCounter aUseCounter, bool aIsPage);
+
+/**
+ * Increments the metric associated with the specific worker use counter.
+ *
+ * @param aUseCounter - The use counter for the feature that was used.
+ * @param aKind - The kind of worker that triggered the use counter.
+ * @returns The name of the metric that was incremented, or "".
+ */
+const char* IncrementWorkerUseCounter(UseCounterWorker aUseCounter,
+                                      WorkerKind aKind);
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // UseCounterMetrics_h_