Change URLRequest to use a ref-counted buffer for actual IO....

chrome/browser/net/url_fetcher.h

 // Copyright (c) 2006-2008 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.
 //
 // This file contains URLFetcher, a wrapper around URLRequest that handles
 // low-level details like thread safety, ref counting, and incremental buffer
 // reading.  This is useful for callers who simply want to get the data from a
 // URL and don't care about all the nitty-gritty details.
 
 #ifndef CHROME_BROWSER_URL_FETCHER_H__
@@ skipping 167 matching lines @@
     GURL original_url_;                // The URL we were asked to fetch
     GURL url_;                         // The URL we eventually wound up at
     RequestType request_type_;         // What type of request is this?
     URLFetcher::Delegate* delegate_;   // Object to notify on completion
     MessageLoop* delegate_loop_;       // Message loop of the creating thread
     MessageLoop* io_loop_;             // Message loop of the IO thread
     URLRequest* request_;              // The actual request this wraps
     int load_flags_;                   // Flags for the load operation
     int response_code_;                // HTTP status code for the request
     std::string data_;                 // Results of the request
-    char buffer_[4096];                // Read buffer
+    scoped_refptr<net::IOBuffer> buffer_;
+                                       // Read buffer
     scoped_refptr<URLRequestContext> request_context_;
                                        // Cookie/cache info for the request
     ResponseCookies cookies_;          // Response cookies
     std::string extra_request_headers_;// Extra headers for the request, if any
     scoped_refptr<net::HttpResponseHeaders> response_headers_;
 
     std::string upload_content_;       // HTTP POST payload
     std::string upload_content_type_;  // MIME type of POST payload
 
     // The overload protection entry for this URL.  This is used to
@@ skipping 11 matching lines @@
     DISALLOW_EVIL_CONSTRUCTORS(Core);
   };
 
   scoped_refptr<Core> core_;
 
   DISALLOW_EVIL_CONSTRUCTORS(URLFetcher);
 };
 
 #endif  // CHROME_BROWSER_URL_FETCHER_H__