Fix stream errors that occur after a stream starts not propagating.

content/browser/streams/stream.h

 // 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 <stddef.h>
 
 #include "base/macros.h"
@@ skipping 56 matching lines @@
   // Adds the data in |buffer| to the stream.  Takes ownership of |buffer|.
   void AddData(scoped_refptr<net::IOBuffer> buffer, size_t size);
   // Adds data of |size| at |data| to the stream. This method creates a copy
   // of the data, and then passes it to |writer_|.
   void AddData(const char* data, size_t size);
 
   // Flushes contents buffered in the stream to the corresponding reader.
   void Flush();
 
   // Notifies this stream that it will not be receiving any more data.
-  void Finalize();
+  void Finalize(int status);
 
   // 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);
 
   std::unique_ptr<StreamHandle> CreateHandle();
   void CloseHandle();
 
+  // Returns the status of the stream. This is either an error code that
+  // occurred while reading, or the status that was set in Finalize above.
+  int GetStatus();
+
   // 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_; }
 
   // For StreamRegistry to remember the last memory usage reported to it.
   size_t last_total_buffered_bytes() const {
     return last_total_buffered_bytes_;
   }
 
@@ skipping 34 matching lines @@
 
   StreamHandleImpl* stream_handle_;
 
   base::WeakPtrFactory<Stream> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(Stream);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_STREAMS_STREAM_H_