Merge pull request #749 from openlayers/webgl-vector

Skeleton WebGL vector support

src/ol/layer/vectorlayer2.exports

@@ -0,0 +1 @@
+@exportSymbol ol.layer.VectorLayer2

src/ol/layer/vectorlayer2.js

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+goog.provide('ol.layer.VectorLayer2');
+
+goog.require('ol.layer.Layer');
+goog.require('ol.source.VectorSource2');
+
+
+
+/**
+ * This is an internal class that will be removed from the API.
+ * @constructor
+ * @extends {ol.layer.Layer}
+ * @param {ol.layer.LayerOptions} options Options.
+ */
+ol.layer.VectorLayer2 = function(options) {
+  goog.base(this, options);
+};
+goog.inherits(ol.layer.VectorLayer2, ol.layer.Layer);
+
+
+/**
+ * @return {ol.source.VectorSource2} Source.
+ */
+ol.layer.VectorLayer2.prototype.getVectorSource = function() {
+  return /** @type {ol.source.VectorSource2} */ (this.getSource());
+};