[Webkit-unassigned] [Bug 148680] Web Inspector: add explicit version checking for legacy backends

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=148680

--- Comment #3 from Joseph Pecoraro <joepeck at webkit.org> ---
I think we could just give the Inspector domain a version number. And bump it whenever we want/need to.

    {
        "domain": "Inspector",
        "constants": [
            { "name": "Version", "value": 1000 }
        ]
    }

Would generate:

    InspectorBackend.registerConstant("Inspector.Version", 1000);

We could retroactively add it to Legacy Inspector-iOS-*.json files. And add WebInspector.BackendVersions.iOS7-9 constants (700, 800, 900) to the frontend.

That said, I still think we should be feature checking the protocol when possible. This would only be used for when we can't easily do that (like new properties in types).

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