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

net/url_request/mime_sniffer_proxy.h

Index: net/url_request/mime_sniffer_proxy.h
===================================================================
--- net/url_request/mime_sniffer_proxy.h	(revision 8697)
+++ net/url_request/mime_sniffer_proxy.h	(working copy)
@@ -19,6 +19,10 @@
 // 2) ms_->mime_type() -- returns the sniffed mime type of the data;
 //    valid after OnResponseStarted() is called.
 
+#ifndef NET_URL_REQUEST_MIME_SNIFFER_PROXY_H_
+#define NET_URL_REQUEST_MIME_SNIFFER_PROXY_H_
+
+#include "net/base/io_buffer.h"
 #include "net/url_request/url_request.h"
 
 class MimeSnifferProxy : public URLRequest::Delegate {
@@ -48,7 +52,7 @@
   }
 
   // Wrapper around URLRequest::Read.
-  bool Read(char* buf, int max_bytes, int *bytes_read);
+  bool Read(net::IOBuffer* buf, int max_bytes, int *bytes_read);
 
   // Return the sniffed mime type of the request.  Valid after
   // OnResponseStarted() has been called on the delegate.
@@ -69,8 +73,9 @@
   bool error_;
 
   // A buffer for the first bit of the request.
-  char buf_[1024];
+  scoped_refptr<net::IOBuffer> buf_;
   // The number of bytes we've read into the buffer.
   int bytes_read_;
 };
 
+#endif  // NET_URL_REQUEST_MIME_SNIFFER_PROXY_H_