Index: os_exchange_data_provider_aurax11.cc
===================================================================
--- os_exchange_data_provider_aurax11.cc	(revision 280796)
+++ os_exchange_data_provider_aurax11.cc	(working copy)
@@ -155,7 +155,8 @@
     format_map_.Insert(atom_cache_.GetAtom(kMimeTypeMozillaURL), mem);
 
     // Set a string fallback as well.
-    SetString(spec);
+    if (!HasString())
+      SetString(spec);
 
     // Return early if this drag already contains file contents (this implies
     // that file contents must be populated before URLs). Nautilus (and possibly