disable-cmd-w.json

{
    "description": "Disable Cmd+W in Google Chrome",
    "manipulators": [
        {
            "conditions": [
                {
                    "bundle_identifiers": [
                        "^com\\.google\\.Chrome$"
                    ],
                    "type": "frontmost_application_if"
                }
            ],
            "from": {
                "key_code": "w",
                "modifiers": {
                    "mandatory": ["left_command"],
                    "optional": ["any"]
                }
            },
            "to": [],
            "type": "basic"
        }
    ]
}