Add ol.BrowserFeature.HAS_FULLSCREEN constant

src/ol/browserfeature.js

@@ -2,6 +2,7 @@ goog.provide('ol.BrowserFeature');
 
 goog.require('goog.dom');
 goog.require('goog.dom.TagName');
+goog.require('goog.dom.fullscreen');
 goog.require('goog.userAgent');
 goog.require('ol.webgl');
 
@@ -141,6 +142,15 @@ ol.BrowserFeature.HAS_DEVICE_ORIENTATION =
 ol.BrowserFeature.HAS_DOM = ol.ENABLE_DOM;
 
 
+/**
+ * True if browser supports the fullscreen API.
+ * @const
+ * @type {boolean}
+ * @todo stability experimental
+ */
+ol.BrowserFeature.HAS_FULLSCREEN = goog.dom.fullscreen.isSupported();
+
+
 /**
  * Is HTML5 geolocation supported in the current browser?
  * @const