Added raytracer to gl samples.

samples/simplegl/web/gl_driver.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+library gl_driver;
+
 import 'dart:html';
-import 'gl_html.dart';
-import 'simplegl.dart';
+import 'gl.dart';
 
 /**
  * A driver to run GL applications in the browser.
  */
-void main() {
+void glMain(setup, resize, draw) {
   // Setup a Canvas for GL to run inside.
-  final canvas = new CanvasElement(width: 480, height: 800);
+  final canvas = new CanvasElement(width: window.innerWidth, height: window.innerHeight);
   document.body.nodes.add(canvas);
-  final context =
-      new HtmlGlContext(canvas.getContext('experimental-webgl'));
+
+  gl = canvas.getContext('experimental-webgl');
 
   // The first 'setup' entry point is called once.
-  setup(context);
+  setup();
+  resize(canvas.width, canvas.height);
 
   // The second 'render' entry point is called each time the canvas should
   // be re-drawn.
   var render;
   render = (n) {
-    draw(context);
+    draw();
     window.requestAnimationFrame(render);
   };
-  render(context);
+  render(0);
+
+  window.on.resize.add((e) {
+    canvas.width = window.innerWidth;
+    canvas.height = window.innerHeight;
+    resize(canvas.width, canvas.height);
+  });
 }