missing types MediaStreamConstraints, NavigatorUserMediaSuccessCallback, NavigatorUserMediaErrorCallback

[0x53A]

babylonjs contains this:

interface Navigator {
    mozGetVRDevices: (any: any) => any;
    webkitGetUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
    mozGetUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
    msGetUserMedia(constraints: MediaStreamConstraints, successCallback: NavigatorUserMediaSuccessCallback, errorCallback: NavigatorUserMediaErrorCallback): void;
    webkitGetGamepads(): Gamepad[];
    msGetGamepads(): Gamepad[];
    webkitGamepads(): Gamepad[];
}

That causes an error:

If I F12 on MediaStreamConstraints in Visual Studio in the babylon.d.ts file, I go to C:\Program Files (x86)\Microsoft SDKs\TypeScript\2.8\lib.dom.d.ts.

So I think these types need to be added to Fable.Import.Browser.

Filing it also here because after it is fixed there, the version used here needs to be reved.

---

With my other pending PRs, this should be the last error in babylonjs. 🎆

So after this issue is fixed, I'll add babylonjs to CI.