ExternalSourceImageStatus  676 Source/core/html/HTMLCanvasElement.cpp         *status = ExternalSourceImageStatus;
ExternalSourceImageStatus 1578 Source/core/html/canvas/CanvasRenderingContext2D.cpp         if (sourceImageStatus == ExternalSourceImageStatus && isAccelerated() && canvas()->buffer())
ExternalSourceImageStatus 1751 Source/core/html/canvas/CanvasRenderingContext2D.cpp     case ExternalSourceImageStatus: // should not happen when mode is CopySourceImageIfVolatile