Adding Size() to AbstractFileEnumerator

webkit/fileapi/file_system_file_util.h

Index: webkit/fileapi/file_system_file_util.h
diff --git a/webkit/fileapi/file_system_file_util.h b/webkit/fileapi/file_system_file_util.h
index 8a46fbdb6d5974369ce2d8e7b12bc76663879425..9a758bebab10635137e5c2810a547c7ca39da311 100644
--- a/webkit/fileapi/file_system_file_util.h
+++ b/webkit/fileapi/file_system_file_util.h
@@ -222,12 +222,14 @@ class FileSystemFileUtil {
     // Returns an empty string if there are no more results.
     virtual FilePath Next() = 0;
 
+    virtual int64 Size() = 0;
     virtual bool IsDirectory() = 0;
   };
 
   class EmptyFileEnumerator : public AbstractFileEnumerator {
-    virtual FilePath Next() { return FilePath(); }
-    virtual bool IsDirectory() { return false; }
+    virtual FilePath Next() OVERRIDE { return FilePath(); }
+    virtual int64 Size() OVERRIDE { return 0; }
+    virtual bool IsDirectory() OVERRIDE { return false; }
   };
 
   // Returns a pointer to a new instance of AbstractFileEnumerator which is