Sync the XHR-related interfaces with the spec

Source/core/html/FormData.idl

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-// http://xhr.spec.whatwg.org/#interface-formdata
+// https://xhr.spec.whatwg.org/#interface-formdata
 
+// TODO(philipj): The FormDataEntryValue typedef should use Blob, not File.
 typedef (File or USVString) FormDataEntryValue;
 
 [
     Constructor(optional HTMLFormElement form),
     Exposed=(Window,Worker),
     GarbageCollected,
     ImplementedAs=DOMFormData,
 ] interface FormData {
+    // TODO(philipj): The value argument should be FormDataEntryValue and there
+    // should be no optional filename argument.
     void append(USVString name, Blob value, optional USVString filename);
     void append(USVString name, USVString value);
 
     [RuntimeEnabled=FormDataNewMethods, ImplementedAs=deleteEntry] void delete(USVString name);
     [RuntimeEnabled=FormDataNewMethods] FormDataEntryValue? get(USVString name);
     [RuntimeEnabled=FormDataNewMethods] sequence<FormDataEntryValue> getAll(USVString name);
     [RuntimeEnabled=FormDataNewMethods, ImplementedAs=hasEntry] boolean has(USVString name);
+    // TODO(philipj): The value argument should be FormDataEntryValue and there
+    // should be no optional filename argument.
     [RuntimeEnabled=FormDataNewMethods] void set(USVString name, Blob value, optional USVString filename);
     [RuntimeEnabled=FormDataNewMethods] void set(USVString name, USVString value);
     [RuntimeEnabled=FormDataNewMethods] iterable<USVString, FormDataEntryValue>;
 };