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

content/browser/renderer_host/redirect_to_file_resource_handler.h

Index: content/browser/renderer_host/redirect_to_file_resource_handler.h
diff --git a/content/browser/renderer_host/redirect_to_file_resource_handler.h b/content/browser/renderer_host/redirect_to_file_resource_handler.h
index 5178ed4f899abbf984046983bfe9b13f580dee16..f9d86d749e1a85f35f588297199a30e9f64cf13c 100644
--- a/content/browser/renderer_host/redirect_to_file_resource_handler.h
+++ b/content/browser/renderer_host/redirect_to_file_resource_handler.h
@@ -16,6 +16,7 @@
 class ResourceDispatcherHost;
 
 namespace net {
+class DrainableIOBuffer;
 class FileStream;
 class GrowableIOBuffer;
 }
@@ -76,7 +77,7 @@ class RedirectToFileResourceHandler : public LayeredResourceHandler {
 
   scoped_refptr<net::GrowableIOBuffer> buf_;
   bool buf_write_pending_;
-  int write_cursor_;
+  scoped_refptr<net::DrainableIOBuffer> write_cursor_;
 
   scoped_ptr<net::FileStream> file_stream_;
   bool write_callback_pending_;