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diff --git a/dom/ipc/MMPrinter.h b/dom/ipc/MMPrinter.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 MMPrinter_h
+#define MMPrinter_h
+
+#include "mozilla/dom/DOMTypes.h"
+#include "nsString.h"
+
+namespace mozilla::dom {
+
+class MMPrinter {
+ public:
+ static void Print(char const* aLocation, const nsAString& aMsg,
+ ClonedMessageData const& aData) {
+ if (MOZ_UNLIKELY(MOZ_LOG_TEST(MMPrinter::sMMLog, LogLevel::Debug))) {
+ MMPrinter::PrintImpl(aLocation, aMsg, aData);
+ }
+ }
+
+ private:
+ static LazyLogModule sMMLog;
+ static void PrintImpl(char const* aLocation, const nsAString& aMsg,
+ ClonedMessageData const& aData);
+};
+
+} // namespace mozilla::dom
+
+#endif /* MMPrinter_h */