net: FileStream::Read/Write() to take IOBuffer* instead of char*

webkit/blob/blob_url_request_job.h

 // Copyright (c) 2011 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 WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
 #define WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/platform_file.h"
 #include "net/http/http_byte_range.h"
 #include "net/url_request/url_request_job.h"
 #include "webkit/blob/blob_data.h"
 #include "webkit/blob/blob_export.h"
 
 namespace base {
 class MessageLoopProxy;
 struct PlatformFileInfo;
 }
 
 namespace net {
+class DrainableIOBuffer;
 class FileStream;
+class IOBuffer;
 }
 
 namespace webkit_blob {
 
 // A request job that handles reading blob URLs.
 class BLOB_EXPORT BlobURLRequestJob : public net::URLRequestJob {
  public:
   BlobURLRequestJob(net::URLRequest* request,
                     BlobData* blob_data,
                     base::MessageLoopProxy* resolving_message_loop_proxy);
@@ skipping 39 matching lines @@
 
   base::WeakPtrFactory<BlobURLRequestJob> weak_factory_;
   scoped_refptr<BlobData> blob_data_;
   scoped_refptr<base::MessageLoopProxy> file_thread_proxy_;
   std::vector<int64> item_length_list_;
   scoped_ptr<net::FileStream> stream_;
   size_t item_index_;
   int64 total_size_;
   int64 current_item_offset_;
   int64 remaining_bytes_;
-  scoped_refptr<net::IOBuffer> read_buf_;
-  int read_buf_offset_;
-  int read_buf_size_;
-  int read_buf_remaining_bytes_;
+  scoped_refptr<net::DrainableIOBuffer> read_buf_;
   int bytes_to_read_;
   bool error_;
   bool headers_set_;
   bool byte_range_set_;
   net::HttpByteRange byte_range_;
   scoped_ptr<net::HttpResponseInfo> response_info_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob);
 };
 
 }  // namespace webkit_blob
 
 #endif  // WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_