Change URL back to the previous one if the typed URL causes file download....

chrome/browser/renderer_host/buffered_resource_handler.h

Index: chrome/browser/renderer_host/buffered_resource_handler.h
===================================================================
--- chrome/browser/renderer_host/buffered_resource_handler.h	(revision 16844)
+++ chrome/browser/renderer_host/buffered_resource_handler.h	(working copy)
@@ -17,7 +17,9 @@
  public:
   BufferedResourceHandler(ResourceHandler* handler,
                           ResourceDispatcherHost* host,
-                          URLRequest* request);
+                          URLRequest* request,
+                          int render_process_host_id,
+                          int render_view_id);
 
   // ResourceHandler implementation:
   bool OnUploadProgress(int request_id, uint64 position, uint64 size);
@@ -48,10 +50,15 @@
   // this is invoked from |OnResponseCompleted|.
   bool CompleteResponseStarted(int request_id, bool in_complete);
 
+  // Notifies TabContents that the resource request resulted in download.
+  void NotifyDownload();
+
   scoped_refptr<ResourceHandler> real_handler_;
   scoped_refptr<ResourceResponse> response_;
   ResourceDispatcherHost* host_;
   URLRequest* request_;
+  int render_process_host_id_;
+  int render_view_id_;
   scoped_refptr<net::IOBuffer> read_buffer_;
   scoped_refptr<net::IOBuffer> my_buffer_;
   int read_buffer_size_;