| Index: Source/core/html/canvas/CanvasRenderingContext2D.idl | 
| diff --git a/Source/core/html/canvas/CanvasRenderingContext2D.idl b/Source/core/html/canvas/CanvasRenderingContext2D.idl | 
| index f6b67b286139f62e007e5c0011563e53e08337b8..4afeef78f46345b5c644a8a315debe6d7c892109 100644 | 
| --- a/Source/core/html/canvas/CanvasRenderingContext2D.idl | 
| +++ b/Source/core/html/canvas/CanvasRenderingContext2D.idl | 
| @@ -71,9 +71,9 @@ enum CanvasFillRule { "nonzero", "evenodd" }; | 
| [Custom] attribute object fillStyle; // (default black) | 
| CanvasGradient createLinearGradient(float x0, float y0, float x1, float y1); | 
| [RaisesException] CanvasGradient createRadialGradient(float x0, float y0, float r0, float x1, float y1, float r1); | 
| -    [RaisesException] CanvasPattern createPattern(HTMLCanvasElement canvas, [TreatNullAs=NullString] DOMString repetitionType); | 
| -    [RaisesException] CanvasPattern createPattern(HTMLImageElement image, [TreatNullAs=NullString] DOMString repetitionType); | 
| -    [RaisesException] CanvasPattern createPattern(HTMLVideoElement image, [TreatNullAs=NullString] DOMString repetitionType); | 
| +    [RaisesException] CanvasPattern createPattern(HTMLCanvasElement canvas, DOMString? repetitionType); | 
| +    [RaisesException] CanvasPattern createPattern(HTMLImageElement image, DOMString? repetitionType); | 
| +    [RaisesException] CanvasPattern createPattern(HTMLVideoElement image, DOMString? repetitionType); | 
|  | 
| // shadows | 
| attribute unrestricted float shadowOffsetX; | 
|  |