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/SVGFEDisplacementMapElement.webidl

@@ -0,0 +1,34 @@
+/* -*- 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://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEDisplacementMapElement : SVGElement {
+
+  // Channel Selectors
+  const unsigned short SVG_CHANNEL_UNKNOWN = 0;
+  const unsigned short SVG_CHANNEL_R = 1;
+  const unsigned short SVG_CHANNEL_G = 2;
+  const unsigned short SVG_CHANNEL_B = 3;
+  const unsigned short SVG_CHANNEL_A = 4;
+
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedString in2;
+  [Constant]
+  readonly attribute SVGAnimatedNumber scale;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration xChannelSelector;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration yChannelSelector;
+};
+
+SVGFEDisplacementMapElement implements SVGFilterPrimitiveStandardAttributes;