Adds multiple forms of MediaStreamTrack constraints

third_party/WebKit/Source/modules/mediastream/MediaTrackConstraintSet.idl

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // https://w3c.github.io/mediacapture-main/getusermedia.html#idl-def-MediaTrackConstraintSet
 
-typedef ConstrainLongRange ConstrainLong;
-typedef ConstrainDoubleRange ConstrainDouble;
-typedef ConstrainBooleanParameters ConstrainBoolean;
-typedef ConstrainDOMStringParameters ConstrainDOMString;
-// The spec says that the typedefs should be:
-// typedef (long or ConstrainLongRange) ConstrainLong;
-// typedef (double or ConstrainDoubleRange) ConstrainDouble;
-// typedef (boolean or ConstrainBooleanParameters) ConstrainBoolean;
-// typedef (DOMString or sequence<DOMString> or ConstrainDomStringParameters) ConstrainDomString;
-// This is blocked on https://crbug.com/524424
+typedef (long or ConstrainLongRange) ConstrainLong;
+typedef (double or ConstrainDoubleRange) ConstrainDouble;
+typedef (boolean or ConstrainBooleanParameters) ConstrainBoolean;
+typedef (DOMString or sequence<DOMString> or ConstrainDOMStringParameters) ConstrainDOMString;
 
 dictionary MediaTrackConstraintSet {
     [RuntimeEnabled=MediaConstraints] ConstrainLong width;
     [RuntimeEnabled=MediaConstraints] ConstrainLong height;
     [RuntimeEnabled=MediaConstraints] ConstrainDouble aspectRatio;
     [RuntimeEnabled=MediaConstraints] ConstrainDouble frameRate;
     [RuntimeEnabled=MediaConstraints] ConstrainDOMString facingMode;
     [RuntimeEnabled=MediaConstraints] ConstrainDouble volume;
     [RuntimeEnabled=MediaConstraints] ConstrainLong sampleRate;
     [RuntimeEnabled=MediaConstraints] ConstrainLong sampleSize;
     [RuntimeEnabled=MediaConstraints] ConstrainBoolean echoCancellation;
     [RuntimeEnabled=MediaConstraints] ConstrainDouble latency;
     [RuntimeEnabled=MediaConstraints] ConstrainLong channelCount;
     [RuntimeEnabled=MediaConstraints] ConstrainDOMString deviceId;
     [RuntimeEnabled=MediaConstraints] ConstrainDOMString groupId;
     // The "mandatory" and "_optional" members are retained for conformance
     // with https://www.w3.org/TR/2013/WD-mediacapture-streams-20130903/
     Dictionary mandatory;
     sequence<Dictionary> _optional;
 };