src/chromium/web_engine/meta/shards/web_engine_base.shard.cmx

{
    "sandbox": {
        "services": [
            "fuchsia.buildinfo.Provider",
            "fuchsia.device.NameProvider",
            "fuchsia.fonts.Provider",
            "fuchsia.intl.PropertyProvider",
            "fuchsia.logger.LogSink",
            "fuchsia.memorypressure.Provider",
            "fuchsia.process.Launcher",
            "fuchsia.sysmem.Allocator",
            "fuchsia.web.ContextProvider"
        ]
    }
}