checkImageSource 1490 Source/core/html/canvas/CanvasRenderingContext2D.cpp     if (!checkImageSource(imageSource, exceptionState))
checkImageSource 1499 Source/core/html/canvas/CanvasRenderingContext2D.cpp     if (!checkImageSource(imageSource, exceptionState))
checkImageSource 1520 Source/core/html/canvas/CanvasRenderingContext2D.cpp     if (!checkImageSource(imageSource, exceptionState))
checkImageSource 1726 Source/core/html/canvas/CanvasRenderingContext2D.cpp     if (!checkImageSource(imageSource, exceptionState))