Pref service: expose all read-only PrefStores through Mojo

services/preferences/public/cpp/preferences_struct_traits.h

Index: services/preferences/public/cpp/preferences_struct_traits.h
diff --git a/services/preferences/public/cpp/preferences_struct_traits.h b/services/preferences/public/cpp/preferences_struct_traits.h
new file mode 100644
index 0000000000000000000000000000000000000000..1c32ab53761ee7b5b704aaa5292e08cd251536a1
--- /dev/null
+++ b/services/preferences/public/cpp/preferences_struct_traits.h
@@ -0,0 +1,38 @@
+// Copyright 2017 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.
+
+#ifndef SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_H_
+#define SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_H_
+
+#include "services/preferences/public/cpp/preferences_struct_traits_macros.h"
+
+// Generate param traits size methods.
+#include "ipc/param_traits_size_macros.h"
+namespace IPC {
+#undef SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_MACROS_H_
+#include "services/preferences/public/cpp/preferences_struct_traits_macros.h"
+}
+
+// Generate param traits write methods.
+#include "ipc/param_traits_write_macros.h"
+namespace IPC {
+#undef SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_MACROS_H_
+#include "services/preferences/public/cpp/preferences_struct_traits_macros.h"
+}  // namespace IPC
+
+// Generate param traits read methods.
+#include "ipc/param_traits_read_macros.h"
+namespace IPC {
+#undef SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_MACROS_H_
+#include "services/preferences/public/cpp/preferences_struct_traits_macros.h"
+}  // namespace IPC
+
+// Generate param traits log methods.
+#include "ipc/param_traits_log_macros.h"
+namespace IPC {
+#undef SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_MACROS_H_
+#include "services/preferences/public/cpp/preferences_struct_traits_macros.h"
+}  // namespace IPC
+
+#endif  // SERVICES_PREFERENCES_PUBLIC_CPP_PREFERENCES_STRUCT_TRAITS_H_