[Streams] Remove SetReadableStreamDisturbed from ReadableStream.js

third_party/WebKit/Source/core/streams/ReadableStream.js

 // 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.
 
 (function(global, binding, v8) {
   'use strict';
 
   const readableStreamController = v8.createPrivateSymbol('[[controller]]');
   const readableStreamQueue = v8.createPrivateSymbol('[[queue]]');
   const readableStreamQueueSize =
@@ skipping 487 matching lines @@
   }
 
   function IsReadableStream(x) {
     return hasOwnProperty(x, readableStreamUnderlyingSource);
   }
 
   function IsReadableStreamDisturbed(stream) {
     return stream[readableStreamBits] & DISTURBED;
   }
 
-  function SetReadableStreamDisturbed(stream) {
-    return stream[readableStreamBits] |= DISTURBED;
-  }
-
   function IsReadableStreamLocked(stream) {
     return stream[readableStreamReader] !== undefined;
   }
 
   function IsReadableStreamController(x) {
     return hasOwnProperty(x, readableStreamControllerControlledReadableStream);
   }
 
   function IsReadableStreamReadable(stream) {
     return stream[readableStreamState] === STATE_READABLE;
@@ skipping 289 matching lines @@
     writable: true
   });
 
   //
   // Exports to Blink
   //
 
   binding.AcquireReadableStreamReader = AcquireReadableStreamReader;
   binding.IsReadableStream = IsReadableStream;
   binding.IsReadableStreamDisturbed = IsReadableStreamDisturbed;
-  binding.SetReadableStreamDisturbed = SetReadableStreamDisturbed;
   binding.IsReadableStreamLocked = IsReadableStreamLocked;
   binding.IsReadableStreamReadable = IsReadableStreamReadable;
   binding.IsReadableStreamClosed = IsReadableStreamClosed;
   binding.IsReadableStreamErrored = IsReadableStreamErrored;
   binding.IsReadableStreamReader = IsReadableStreamReader;
   binding.ReadFromReadableStreamReader = ReadFromReadableStreamReader;
 
   binding.CloseReadableStream = CloseReadableStream;
   binding.GetReadableStreamDesiredSize = GetReadableStreamDesiredSize;
   binding.EnqueueInReadableStream = EnqueueInReadableStream;
   binding.ErrorReadableStream = ErrorReadableStream;
 
   binding.createReadableStreamWithExternalController =
       (underlyingSource, strategy) => {
         return new ReadableStream(
             underlyingSource, strategy, createWithExternalControllerSentinel);
       };
 });