validateHTMLCanvasElement 3433 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateHTMLCanvasElement("texImage2D", canvas, exceptionState) || !validateTexFunc("texImage2D", NotTexSubImage2D, SourceHTMLCanvasElement, target, level, internalformat, canvas->width(), canvas->height(), 0, format, type, 0, 0))
validateHTMLCanvasElement 3676 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateHTMLCanvasElement("texSubImage2D", canvas, exceptionState)
validateHTMLCanvasElement  826 Source/core/html/canvas/WebGLRenderingContextBase.h     bool validateHTMLCanvasElement(const char* functionName, HTMLCanvasElement*, ExceptionState&);