tree 5a9d3379488fd3cb56d7a67bb0b28e41ef48f086
parent c9f101b745929a50b391abf446cefb6b2f4b4bd6
author mcasas <mcasas@chromium.org> 1491499889 -0700
committer Commit bot <commit-bot@chromium.org> 1491499889 +0000

Image Capture: make sure applyConstraints() only works for ImageCapture constraints

This CL:
 - makes sure MediaStreamTrack::applyConstraints() is rejected if non
 image-capture related constraints are passed; (this follows the
 Spec e.g. in [1], " If the constraints cannot be applied, the promise is
 rejected").

- generally cleans up  MediaStreamTrack::applyConstraints() moving
 part of the TODO()s to Image Capture so that they are in the
 same place (facilitates later reviews).

 - derives to clearMediaTrackConstraints() if the constraint set is
 empty, after spec issue somehow clarified it

LayoutTests updated/extended.

[1] https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamTrack/applyConstraints#Return_value

BUG=700607, 708723

Review-Url: https://codereview.chromium.org/2804653003
Cr-Commit-Position: refs/heads/master@{#462531}