DataTransferItemList#add() file argument should not be nullable

third_party/WebKit/Source/core/clipboard/DataTransferItemList.idl

Index: third_party/WebKit/Source/core/clipboard/DataTransferItemList.idl
diff --git a/third_party/WebKit/Source/core/clipboard/DataTransferItemList.idl b/third_party/WebKit/Source/core/clipboard/DataTransferItemList.idl
index bbdbc8e8a705151d2d1757ca38010efe7da155a6..a38c0578d1027f1cba0250e46eb39f2486129e91 100644
--- a/third_party/WebKit/Source/core/clipboard/DataTransferItemList.idl
+++ b/third_party/WebKit/Source/core/clipboard/DataTransferItemList.idl
@@ -34,8 +34,7 @@ interface DataTransferItemList {
     readonly attribute unsigned long length;
     [ImplementedAs=item] getter DataTransferItem (unsigned long index);
     [RaisesException] DataTransferItem? add(DOMString data, DOMString type);
-    // TODO(foolip): The file argument should not be nullable.
-    DataTransferItem? add(File? file);
+    DataTransferItem? add(File file);
     [RaisesException, ImplementedAs=deleteItem] void remove(unsigned long index);
     void clear();
 };