From 749dacc74918698980f5263ba21dce36fbbc513e Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Tue, 17 Nov 2015 12:36:29 +0100
Subject: [PATCH] Allow '' for crossOrigin (as Anonymous alias)

This fixes a regression introduced by the goog.isDef removal.

From the HTML 5 spec: "The empty string is also a valid keyword, and
maps to the Anonymous state"
---
 src/ol/image.js           | 2 +-
 src/ol/imagetile.js       | 2 +-
 src/ol/style/iconstyle.js | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ol/image.js b/src/ol/image.js
index 398f2af1ec..6b426d962c 100644
--- a/src/ol/image.js
+++ b/src/ol/image.js
@@ -38,7 +38,7 @@ ol.Image = function(extent, resolution, pixelRatio, attributions, src,
    * @type {HTMLCanvasElement|Image|HTMLVideoElement}
    */
   this.image_ = new Image();
-  if (crossOrigin) {
+  if (crossOrigin !== null) {
     this.image_.crossOrigin = crossOrigin;
   }
 
diff --git a/src/ol/imagetile.js b/src/ol/imagetile.js
index 131be58b27..74dfaa3953 100644
--- a/src/ol/imagetile.js
+++ b/src/ol/imagetile.js
@@ -37,7 +37,7 @@ ol.ImageTile = function(tileCoord, state, src, crossOrigin, tileLoadFunction) {
    * @type {Image}
    */
   this.image_ = new Image();
-  if (crossOrigin) {
+  if (crossOrigin !== null) {
     this.image_.crossOrigin = crossOrigin;
   }
 
diff --git a/src/ol/style/iconstyle.js b/src/ol/style/iconstyle.js
index ad52456147..8417b08a9d 100644
--- a/src/ol/style/iconstyle.js
+++ b/src/ol/style/iconstyle.js
@@ -392,7 +392,7 @@ ol.style.IconImage_ = function(image, src, size, crossOrigin, imageState) {
    */
   this.image_ = !image ? new Image() : image;
 
-  if (crossOrigin) {
+  if (crossOrigin !== null) {
     this.image_.crossOrigin = crossOrigin;
   }