Fix webkitGetEntry for non-native files.

content/renderer/drop_data_builder.cc

Index: content/renderer/drop_data_builder.cc
diff --git a/content/renderer/drop_data_builder.cc b/content/renderer/drop_data_builder.cc
index e10d8d798788b9e2289cd674d95d38aa2e70eeb1..3dc64de3a3e89739d77b76d0d02f6ce1a7fab76c 100644
--- a/content/renderer/drop_data_builder.cc
+++ b/content/renderer/drop_data_builder.cc
@@ -69,6 +69,7 @@ DropData DropDataBuilder::Build(const WebDragData& drag_data) {
         DropData::FileSystemFileInfo info;
         info.url = item.fileSystemURL;
         info.size = item.fileSystemFileSize;
+        info.filesystem_id = item.fileSystemId.ascii();
         result.file_system_files.push_back(info);
         break;
       }