Re: [mediacapture-image] is grabFrame necessary?

Related to this, @mounirlamouri argued in #84 that `grabFrame()` might
 be a better citizen of `MediaStreamTrack`.  

A similar pattern was used for `<canvas>.captureStream()` where a 
[`CanvasCaptureMediaStreamTrack`](https://w3c.github.io/mediacapture-fromelement/#dom-canvascapturemediastreamtrack)
 was introduced in order to have a single method 
[`requestFrame()`](https://w3c.github.io/mediacapture-fromelement/#dom-canvascapturemediastreamtrack-requestframe).
  

We could do something similar here, if that would address the concerns
 of @mounirlamouri and @travisleithead.  @alvestrand, @gmandyam what 
do you think?

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Received on Thursday, 19 January 2017 19:28:13 UTC