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

chrome/browser/renderer_host/resource_handler.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 is the browser side of the resource dispatcher, it receives requests
 // from the RenderProcessHosts, and dispatches them to URLRequests. It then
 // fowards the messages from the URLRequests back to the correct process for
 // handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 31 matching lines @@
 
   // Response headers and meta data are available.
   virtual bool OnResponseStarted(int request_id,
                                  ResourceResponse* response) = 0;
 
   // Data will be read for the response.  Upon success, this method places the
   // size and address of the buffer where the data is to be written in its
   // out-params.  This call will be followed by either OnReadCompleted or
   // OnResponseCompleted, at which point the buffer may be recycled.
   virtual bool OnWillRead(int request_id,
-                          char** buf,
+                          net::IOBuffer** buf,
                           int* buf_size,
                           int min_size) = 0;
 
   // Data (*bytes_read bytes) was written into the buffer provided by
   // OnWillRead. A return value of false cancels the request, true continues
   // reading data.
   virtual bool OnReadCompleted(int request_id, int* bytes_read) = 0;
 
   // The response is complete.  The final response status is given.
   // Returns false if the handler is deferring the call to a later time.
   virtual bool OnResponseCompleted(int request_id,
                                    const URLRequestStatus& status) = 0;
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RESOURCE_HANDLER_H_