Streams Implementation Update: Reader name and Stream methods

Source/core/streams/ReadableStreamReader.idl

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+enum ReadableStreamState {
+    "readable",
+    "waiting",
+    "closed",
+    "errored"
+};
+
 [
     RuntimeEnabled=ExperimentalStream,
     GarbageCollected,
     ActiveDOMObject,
     Exposed=(Window,Worker),
-] interface ExclusiveStreamReader {
+] interface ReadableStreamReader {
     // FIXME: Add constructor.
 
     [CallWith=ScriptState] readonly attribute Promise closed;
     readonly attribute boolean isActive;
     [CallWith=ScriptState] readonly attribute Promise ready;
-    // See ReadableStream.state.
-    readonly attribute DOMString state;
+    readonly attribute ReadableStreamState state;
 
     [CallWith=ScriptState] Promise cancel(any reason);
     [CallWith=ScriptState, RaisesException] any read();
     void releaseLock();
 };