Function makeDebugContext

* Given a WebGL context returns a wrapped context that calls * gl.getError after every command and calls a function if the * result is not gl.NO_ERROR. * * @param {!WebGLRenderingContext} ctx The webgl context to * wrap. * @param {!function(err, funcName, args): void} opt_onErrorFunc *

(ctx, opt_onErrorFunc, opt_onFunc)