net: Don't merge HTTP headers and body if the body is not in memory.

net/base/upload_data_stream.h

 // Copyright (c) 2012 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 NET_BASE_UPLOAD_DATA_STREAM_H_
 #define NET_BASE_UPLOAD_DATA_STREAM_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
@@ skipping 48 matching lines @@
   // Returns whether there is no more data to read, regardless of whether
   // position < size.
   bool eof() const { return eof_; }
 
   // Returns whether the data available in buf() includes the last chunk in a
   // chunked data stream. This method returns true once the final chunk has been
   // placed in the IOBuffer returned by buf(), in contrast to eof() which
   // returns true only after the data in buf() has been consumed.
   bool IsOnLastChunk() const;
 
+  // Returns true if the upload data in the stream is entirely in memory.
+  bool IsInMemory() const;
+
   // This method is provided only to be used by unit tests.
   static void set_merge_chunks(bool merge) { merge_chunks_ = merge; }
 
  private:
   // Protects from public access since now we have a static creator function
   // which will do both creation and initialization and might return an error.
   explicit UploadDataStream(UploadData* data);
 
   // Fills the buffer with any remaining data and sets eof_ if there was nothing
   // left to fill the buffer with.
@@ skipping 36 matching lines @@
   static bool merge_chunks_;
   // The size of the stream's buffer pointed by buf_.
   static const size_t kBufferSize;
 
   DISALLOW_COPY_AND_ASSIGN(UploadDataStream);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_UPLOAD_DATA_STREAM_H_