Revert 187230

content/browser/streams/stream.h

Index: content/browser/streams/stream.h
===================================================================
--- content/browser/streams/stream.h	(revision 187273)
+++ content/browser/streams/stream.h	(working copy)
@@ -1,99 +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_H_
-#define CONTENT_BROWSER_STREAMS_STREAM_H_
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-#include "content/browser/download/byte_stream.h"
-#include "content/common/content_export.h"
-#include "googleurl/src/gurl.h"
-
-namespace net {
-class IOBuffer;
-}
-
-namespace content {
-
-class StreamReadObserver;
-class StreamRegistry;
-class StreamWriteObserver;
-
-// A stream that sends data from an arbitrary source to an internal URL
-// that can be read by an internal consumer.  It will continue to pull from the
-// original URL as long as there is data available.  It can be read from
-// multiple clients, but only one can be reading at a time. This allows a
-// reader to consume part of the stream, then pass it along to another client
-// to continue processing the stream.
-class CONTENT_EXPORT Stream : public base::RefCountedThreadSafe<Stream> {
- public:
-  enum StreamState {
-    STREAM_HAS_DATA,
-    STREAM_COMPLETE,
-    STREAM_EMPTY,
-  };
-
-  // Creates a stream useable from the |security_origin|.
-  Stream(StreamRegistry* registry,
-         StreamWriteObserver* write_observer,
-         const GURL& security_origin,
-         const GURL& url);
-
-  // Sets the reader of this stream. Returns true on success, or false if there
-  // is already a reader.
-  bool SetReadObserver(StreamReadObserver* observer);
-
-  // Removes the read observer.  |observer| must be the current observer.
-  void RemoveReadObserver(StreamReadObserver* observer);
-
-  // Adds the data in |buffer| to the stream.  Takes ownership of |buffer|.
-  void AddData(scoped_refptr<net::IOBuffer> buffer, size_t size);
-
-  // Notifies this stream that it will not be receiving any more data.
-  void Finalize();
-
-  // Reads a maximum of |buf_size| from the stream into |buf|.  Sets
-  // |*bytes_read| to the number of bytes actually read.
-  // Returns STREAM_HAS_DATA if data was read, STREAM_EMPTY if no data was read,
-  // and STREAM_COMPLETE if the stream is finalized and all data has been read.
-  StreamState ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read);
-
-  // Indicates whether there is space in the buffer to add more data.
-  bool can_add_data() const { return can_add_data_; }
-
-  const GURL& url() const { return url_; }
-
-  const GURL& security_origin() const { return security_origin_; }
-
- private:
-  friend class base::RefCountedThreadSafe<Stream>;
-
-  virtual ~Stream();
-
-  void OnSpaceAvailable();
-  void OnDataAvailable();
-
-  size_t bytes_read_;
-  bool can_add_data_;
-
-  GURL security_origin_;
-  GURL url_;
-
-  scoped_refptr<net::IOBuffer> data_;
-  size_t data_length_;
-
-  scoped_ptr<ByteStreamWriter> writer_;
-  scoped_ptr<ByteStreamReader> reader_;
-
-  StreamRegistry* registry_;
-  StreamReadObserver* read_observer_;
-  StreamWriteObserver* write_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(Stream);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_STREAMS_STREAM_H_