Correct handling of cross-frame functions in ddc.

tools/dom/templates/html/impl/impl_Blob.darttemplate

Index: tools/dom/templates/html/impl/impl_Blob.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Blob.darttemplate b/tools/dom/templates/html/impl/impl_Blob.darttemplate
index 62ac4c70eea54307e94ed15f1dd09e4de96d131b..8cf70b96e636b52cda43c3981a4a26ae6018ea49 100644
--- a/tools/dom/templates/html/impl/impl_Blob.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Blob.darttemplate
@@ -20,8 +20,8 @@ $if DART2JS
     return _create_2(blobParts, bag);
   }
 
-  static _create_1(parts) => JS('Blob', 'new window.Blob(#)', parts);
-  static _create_2(parts, bag) => JS('Blob', 'new window.Blob(#, #)', parts, bag);
+  static _create_1(parts) => JS('Blob', 'new self.Blob(#)', parts);
+  static _create_2(parts, bag) => JS('Blob', 'new self.Blob(#, #)', parts, bag);
 
   static _create_bag() => JS('var', '{}');
   static _bag_set(bag, key, value) { JS('void', '#[#] = #', bag, key, value); }