Always pass on a compare function to sort

src/ol/renderer/canvas/canvastilelayerrenderer.js

@@ -8,6 +8,7 @@ goog.require('goog.vec.Mat4');
 goog.require('ol.Size');
 goog.require('ol.TileRange');
 goog.require('ol.TileState');
+goog.require('ol.array');
 goog.require('ol.dom');
 goog.require('ol.extent');
 goog.require('ol.layer.Tile');
@@ -364,7 +365,7 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame =
 
   /** @type {Array.<number>} */
   var zs = Object.keys(tilesToDrawByZ).map(Number);
-  zs.sort();
+  zs.sort(ol.array.defaultCompare);
   var opaque = tileSource.getOpaque();
   var origin = ol.extent.getTopLeft(tileGrid.getTileCoordExtent(
       [z, canvasTileRange.minX, canvasTileRange.maxY],

src/ol/renderer/canvas/canvasvectortilelayerrenderer.js

@@ -8,6 +8,7 @@ goog.require('ol.TileRange');
 goog.require('ol.TileState');
 goog.require('ol.VectorTile');
 goog.require('ol.ViewHint');
+goog.require('ol.array');
 goog.require('ol.dom');
 goog.require('ol.extent');
 goog.require('ol.layer.VectorTile');
@@ -405,7 +406,7 @@ ol.renderer.canvas.VectorTileLayer.prototype.prepareFrame =
 
   /** @type {Array.<number>} */
   var zs = Object.keys(tilesToDrawByZ).map(Number);
-  zs.sort();
+  zs.sort(ol.array.defaultCompare);
   var replayables = [];
   var i, ii, currentZ, tileCoordKey, tilesToDraw;
   for (i = 0, ii = zs.length; i < ii; ++i) {

src/ol/renderer/dom/domtilelayerrenderer.js

@@ -13,6 +13,7 @@ goog.require('ol.TileCoord');
 goog.require('ol.TileRange');
 goog.require('ol.TileState');
 goog.require('ol.ViewHint');
+goog.require('ol.array');
 goog.require('ol.dom');
 goog.require('ol.extent');
 goog.require('ol.layer.Tile');
@@ -177,7 +178,7 @@ ol.renderer.dom.TileLayer.prototype.prepareFrame =
 
   /** @type {Array.<number>} */
   var zs = Object.keys(tilesToDrawByZ).map(Number);
-  zs.sort();
+  zs.sort(ol.array.defaultCompare);
 
   /** @type {Object.<number, boolean>} */
   var newTileLayerZKeys = {};
@@ -203,7 +204,7 @@ ol.renderer.dom.TileLayer.prototype.prepareFrame =
 
   /** @type {Array.<number>} */
   var tileLayerZKeys = Object.keys(this.tileLayerZs_).map(Number);
-  tileLayerZKeys.sort();
+  tileLayerZKeys.sort(ol.array.defaultCompare);
 
   var i, ii, j, origin, resolution;
   var transform = goog.vec.Mat4.createNumber();

src/ol/renderer/webgl/webgltilelayerrenderer.js

@@ -9,6 +9,7 @@ goog.require('goog.vec.Vec4');
 goog.require('goog.webgl');
 goog.require('ol.TileRange');
 goog.require('ol.TileState');
+goog.require('ol.array');
 goog.require('ol.extent');
 goog.require('ol.layer.Tile');
 goog.require('ol.math');
@@ -296,7 +297,7 @@ ol.renderer.webgl.TileLayer.prototype.prepareFrame =
 
     /** @type {Array.<number>} */
     var zs = Object.keys(tilesToDrawByZ).map(Number);
-    zs.sort();
+    zs.sort(ol.array.defaultCompare);
     var u_tileOffset = goog.vec.Vec4.createFloat32();
     var i, ii, sx, sy, tileKey, tilesToDraw, tx, ty;
     for (i = 0, ii = zs.length; i < ii; ++i) {