Try to enable all webidls (#573)

* Try to enable all webidls

* Separate out unavailable webidl files by reason.

* Create record of fully tested WebIDL files

* Update notes to reflect new situation with web-idl

* Make a blank ident fail, disable the necessary widls.

It turns out that all the blank idents came from blank enum variants,
which is allowed in webidl apparently.

crates/web-sys/webidls/enabled/MediaTrackSupportedConstraints.webidl

@@ -0,0 +1,43 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ */
+
+dictionary MediaTrackSupportedConstraints {
+    boolean width = true;
+    boolean height = true;
+    boolean aspectRatio;        // to be supported
+    boolean frameRate = true;
+    boolean facingMode = true;
+    boolean volume;             // to be supported
+    boolean sampleRate;         // to be supported
+    boolean sampleSize;         // to be supported
+    boolean echoCancellation = true;
+    boolean noiseSuppression = true;
+    boolean autoGainControl = true;
+    boolean latency;            // to be supported
+    boolean channelCount = true;
+    boolean deviceId = true;
+    boolean groupId;            // to be supported
+
+    // Mozilla-specific extensions:
+
+    // http://fluffy.github.io/w3c-screen-share/#screen-based-video-constraints
+    // OBE by http://w3c.github.io/mediacapture-screen-share
+
+    boolean mediaSource = true;
+
+    // Experimental https://bugzilla.mozilla.org/show_bug.cgi?id=1131568#c3
+    //              https://bugzilla.mozilla.org/show_bug.cgi?id=1193075
+
+    boolean browserWindow = true;
+    boolean scrollWithPage = true;
+    boolean viewportOffsetX = true;
+    boolean viewportOffsetY = true;
+    boolean viewportWidth = true;
+    boolean viewportHeight = true;
+};