Revert 187230

content/browser/streams/stream_write_observer.h

Index: content/browser/streams/stream_write_observer.h
===================================================================
--- content/browser/streams/stream_write_observer.h	(revision 187273)
+++ content/browser/streams/stream_write_observer.h	(working copy)
@@ -1,24 +0,0 @@
-// Copyright (c) 2013 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.
-
-#ifndef CONTENT_BROWSER_STREAMS_STREAM_WRITE_OBSERVER_H_
-#define CONTENT_BROWSER_STREAMS_STREAM_WRITE_OBSERVER_H_
-
-namespace content {
-
-class Stream;
-
-class StreamWriteObserver {
- public:
-  // Sent when space becomes available in the stream, and the source should
-  // resume writing.
-  virtual void OnSpaceAvailable(Stream* stream) = 0;
-
- protected:
-  virtual ~StreamWriteObserver() {}
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_STREAMS_STREAM_WRITE_OBSERVER_H_