| Index: third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.idl
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| diff --git a/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.idl b/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.idl
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| index 88f5c5bf562c3bf728a843938ef12ea1709d4ef6..0f1396e6d575bd38a7c6480e2b38718eb5223444 100644
 | 
| --- a/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.idl
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| +++ b/third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.idl
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| @@ -12,4 +12,5 @@
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|      [RaisesException=Setter, EnforceRange] attribute unsigned long height;
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|  
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|      [RaisesException] ImageBitmap transferToImageBitmap();
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| +    [RaisesException, CallWith=ScriptState] Promise<Blob> convertToBlob(optional ImageEncodeOptions options);
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|  };
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| 
 |