Stop referencing DisplayMediaStreamConstraints dictionary #21
Description
Several recent non-constraint member additions to the DisplayMediaStreamConstraints dictionary are not relevant to getViewportMedia:
dictionary DisplayMediaStreamConstraints {
(boolean or MediaTrackConstraints) video = true;
(boolean or MediaTrackConstraints) audio = false;
SelfCapturePreferenceEnum selfBrowserSurface; // 1
SystemAudioPreferenceEnum systemAudio; // 2
SurfaceSwitchingPreferenceEnum surfaceSwitching; // 3
};This spec needs to maintain its own copy of this dictionary without these additions.