Refactoring source image usage in CanvasRenderingContext2D

Source/core/html/canvas/CanvasRenderingContext2D.idl

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 138 matching lines @@
     void setShadow(float width, float height, float blur, float c, float m, float y, float k, float a);
 
     [RaisesException] void putImageData(ImageData? imagedata, float dx, float dy);
     [RaisesException] void putImageData(ImageData? imagedata, float dx, float dy, float dirtyX, float dirtyY, float dirtyWidth, float dirtyHeight);
 
     [RaisesException, DeprecateAs=PrefixedPutImageDataHD] void webkitPutImageDataHD(ImageData? imagedata, float dx, float dy);
     [RaisesException, DeprecateAs=PrefixedPutImageDataHD] void webkitPutImageDataHD(ImageData? imagedata, float dx, float dy, float dirtyX, float dirtyY, float dirtyWidth, float dirtyHeight);
 
     [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] ImageData createImageData(ImageData? imagedata);
     [RaisesException] ImageData createImageData(float sw, float sh);
 
     [Custom] attribute object strokeStyle;
     [Custom] attribute object fillStyle;
 
     // pixel manipulation
     [RaisesException] ImageData getImageData(float sx, float sy, float sw, float sh);
 
     [RaisesException, DeprecateAs=PrefixedGetImageDataHD] ImageData webkitGetImageDataHD(float sx, float sy, float sw, float sh);
 
     // Focus rings
     [RuntimeEnabled=ExperimentalCanvasFeatures] void drawSystemFocusRing(Element element);
     [RuntimeEnabled=ExperimentalCanvasFeatures] boolean drawCustomFocusRing(Element element);
 
     readonly attribute float webkitBackingStorePixelRatio;
 
     [ImplementedAs=imageSmoothingEnabled, MeasureAs=PrefixedImageSmoothingEnabled] attribute boolean webkitImageSmoothingEnabled;
     [MeasureAs=UnprefixedImageSmoothingEnabled] attribute boolean imageSmoothingEnabled;
 
     Canvas2DContextAttributes getContextAttributes();
 };