Sync the File API interfaces with the spec

Source/core/fileapi/FileReaderSync.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.
  */
 
+// https://w3c.github.io/FileAPI/#FileReaderSync
+
 [
     GarbageCollected,
     Exposed=Worker,
     Constructor
 ] interface FileReaderSync {
     [CallWith=ExecutionContext, RaisesException] ArrayBuffer readAsArrayBuffer(Blob blob);
-    [CallWith=ExecutionContext, RaisesException] DOMString readAsBinaryString(Blob blob);
-    [CallWith=ExecutionContext, RaisesException] DOMString readAsText(Blob blob, optional DOMString encoding);
+    // TODO(philipj): readAsBinaryString() was removed from the spec in 2012:
+    // https://github.com/w3c/FileAPI/commit/8cce54559dc27bf8b8244f3f0ca9fb3e4d96efdb
+    [CallWith=ExecutionContext, RaisesException, Measure] DOMString readAsBinaryString(Blob blob);
+    [CallWith=ExecutionContext, RaisesException] DOMString readAsText(Blob blob, optional DOMString label);
     [CallWith=ExecutionContext, RaisesException] DOMString readAsDataURL(Blob blob);
 };