chrome/browser/devtools/cros_protocol.json

{
    "domains": [
        {
            "domain": "WindowManager",
            "commands": [
                {
                  "name": "enterOverviewMode",
                  "description": "Enter the overview mode."
                },
                {
                  "name": "exitOverviewMode",
                  "description": "Exit the overview mode."
                }
            ]
        }
    ],
    "version": {
        "major": "1",
        "minor": "0"
    }
}