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

{
    "sandbox": {
        "services": [
            "fuchsia.accessibility.semantics.SemanticsManager",
            "fuchsia.input.virtualkeyboard.ControllerCreator",
            "fuchsia.ui.input3.Keyboard",
            "fuchsia.ui.scenic.Scenic"
        ]
    }
}