This test runs the WebGL Test listed below in an iframe and reports PASS or FAIL.

Test: ../../resources/webgl_test_files/conformance/canvas/drawingbuffer-test.html
[ 1: PASS ] context exists
[ 2: PASS ] gl.drawingBufferWidth is gl.canvas.width
[ 3: PASS ] gl.drawingBufferHeight is gl.canvas.height
[ 4: PASS ] maxSize[0] > 0 is true
[ 5: PASS ] maxSize[1] > 0 is true
[ 6: PASS ] context exists
[ 7: PASS ] gl.getParameter(gl.MAX_VIEWPORT_DIMS)[0] is maxSize[0]
[ 8: PASS ] gl.getParameter(gl.MAX_VIEWPORT_DIMS)[1] is maxSize[1]
[ 9: PASS ] gl.getParameter(gl.VIEWPORT)[0] is 0
[ 10: PASS ] gl.getParameter(gl.VIEWPORT)[1] is 0
[ 11: PASS ] gl.getParameter(gl.VIEWPORT)[2] is gl.drawingBufferWidth
[ 12: PASS ] gl.getParameter(gl.VIEWPORT)[3] is gl.drawingBufferHeight
[ 13: PASS ] gl.getParameter(gl.VIEWPORT)[0] is oldViewport[0]
[ 14: PASS ] gl.getParameter(gl.VIEWPORT)[1] is oldViewport[1]
[ 15: PASS ] gl.getParameter(gl.VIEWPORT)[2] is oldViewport[2]
[ 16: PASS ] gl.getParameter(gl.VIEWPORT)[3] is oldViewport[3]
[ 17: PASS ] gl.getError() is gl.NO_ERROR
[ 18: PASS ] context exists
[ 19: PASS ] gl.getParameter(gl.MAX_VIEWPORT_DIMS)[0] is maxSize[0]
[ 20: PASS ] gl.getParameter(gl.MAX_VIEWPORT_DIMS)[1] is maxSize[1]
[ 21: PASS ] gl.getParameter(gl.VIEWPORT)[0] is 0
[ 22: PASS ] gl.getParameter(gl.VIEWPORT)[1] is 0
[ 23: PASS ] gl.getParameter(gl.VIEWPORT)[2] is gl.drawingBufferWidth
[ 24: PASS ] gl.getParameter(gl.VIEWPORT)[3] is gl.drawingBufferHeight
[ 25: PASS ] gl.getParameter(gl.VIEWPORT)[0] is oldViewport[0]
[ 26: PASS ] gl.getParameter(gl.VIEWPORT)[1] is oldViewport[1]
[ 27: PASS ] gl.getParameter(gl.VIEWPORT)[2] is oldViewport[2]
[ 28: PASS ] gl.getParameter(gl.VIEWPORT)[3] is oldViewport[3]
[ 29: FAIL ] gl.getError() should be 0. Was 1281.
[ 30: PASS ] successfullyParsed is true
[ FAIL ] 1 failures reported