Add abstract tag at class level

src/ol/render/replaygroup.js

@@ -4,6 +4,7 @@ goog.provide('ol.render.ReplayGroup');
 /**
  * Base class for replay groups.
  * @constructor
+ * @abstract
  */
 ol.render.ReplayGroup = function() {};
 

src/ol/render/vectorcontext.js

@@ -5,6 +5,7 @@ goog.provide('ol.render.VectorContext');
  * Context for drawing geometries.  A vector context is available on render
  * events and does not need to be constructed directly.
  * @constructor
+ * @abstract
  * @struct
  * @api
  */

src/ol/render/webgl/replay.js

@@ -12,6 +12,7 @@ if (ol.ENABLE_WEBGL) {
 
   /**
    * @constructor
+   * @abstract
    * @extends {ol.render.VectorContext}
    * @param {number} tolerance Tolerance.
    * @param {ol.Extent} maxExtent Max extent.

src/ol/render/webgl/textreplay.js

@@ -7,6 +7,7 @@ if (ol.ENABLE_WEBGL) {
 
   /**
    * @constructor
+   * @abstract
    * @param {number} tolerance Tolerance.
    * @param {ol.Extent} maxExtent Max extent.
    * @struct