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

Test: ../../../../resources/webgl_test_files/deqp/functional/gles3/framebufferblit/default_framebuffer_03.html
[ 1: FAIL ] blit.default_framebuffer.rgba4:
[ 2: FAIL ] blit.default_framebuffer.rgba4_nearest_scale_blit_from_default:
[ 3: FAIL ] blit.default_framebuffer.rgba4_nearest_scale_blit_to_default:
[ 4: FAIL ] blit.default_framebuffer.rgba4_linear_scale_blit_from_default:
[ 5: FAIL ] blit.default_framebuffer.rgba4_linear_scale_blit_to_default:
[ 6: FAIL ] blit.default_framebuffer.rgba4_linear_out_of_bounds_blit_from_default:
[ 7: FAIL ] blit.default_framebuffer.rgba4_linear_out_of_bounds_blit_to_default:
[ 8: PASS ] blit.default_framebuffer.rg32f_nearest_out_of_bounds_blit_to_default: successfullyParsed is true
[ FAIL ] 7 failures reported