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/FileReader.webidl

@@ -0,0 +1,50 @@
+/* -*- 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
+ * https://w3c.github.io/FileAPI/#APIASynch
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor,
+ Exposed=(Window,Worker,System)]
+interface FileReader : EventTarget {
+  // async read methods
+  [Throws]
+  void readAsArrayBuffer(Blob blob);
+  [Throws]
+  void readAsBinaryString(Blob filedata);
+  [Throws]
+  void readAsText(Blob blob, optional DOMString label);
+  [Throws]
+  void readAsDataURL(Blob blob);
+
+  void abort();
+
+  // states
+  const unsigned short EMPTY = 0;
+  const unsigned short LOADING = 1;
+  const unsigned short DONE = 2;
+
+
+  readonly attribute unsigned short readyState;
+
+  // File or Blob data
+  // bug 858217: readonly attribute (DOMString or ArrayBuffer)? result;
+  [Throws]
+  readonly attribute any result;
+
+  readonly attribute DOMException? error;
+
+  // event handler attributes
+  attribute EventHandler onloadstart;
+  attribute EventHandler onprogress;
+  attribute EventHandler onload;
+  attribute EventHandler onabort;
+  attribute EventHandler onerror;
+  attribute EventHandler onloadend;
+};