| Index: Source/core/html/HTMLCanvasElement.idl | 
| diff --git a/Source/core/html/HTMLCanvasElement.idl b/Source/core/html/HTMLCanvasElement.idl | 
| index aa4aabb4cefd3cf2ca23fbea2f1f2ecb676f21e3..5f97987d6c470a235eaebfe8727debe77b9489e2 100644 | 
| --- a/Source/core/html/HTMLCanvasElement.idl | 
| +++ b/Source/core/html/HTMLCanvasElement.idl | 
| @@ -29,7 +29,7 @@ interface HTMLCanvasElement : HTMLElement { | 
| attribute long width; | 
| attribute long height; | 
|  | 
| -    [Custom, RaisesException] DOMString toDataURL([TreatNullAs=NullString, TreatUndefinedAs=NullString,Default=Undefined] optional DOMString type); | 
| +    [Custom, RaisesException] DOMString toDataURL([TreatUndefinedAs=NullString, Default=Undefined] optional DOMString? type); | 
|  | 
| // The custom binding is needed to handle context creation attributes. | 
| [Custom] any getContext([Default=Undefined] optional DOMString contextId); | 
|  |