Avoiding unnecessary repeated checks of navigator.userAgent. The constants added here should not be used outside the library. In the future, they should be removed from the library. r=ahocevar (closes #2911)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10868 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/SVG.js

@@ -49,12 +49,6 @@ OpenLayers.Renderer.SVG = OpenLayers.Class(OpenLayers.Renderer.Elements, {
      */
     symbolMetrics: null,
     
-    /**
-     * Property: isGecko
-     * {Boolean}
-     */
-    isGecko: null,
-
     /**
      * Property: supportUse
      * {Boolean} true if defs/use is supported - known to not work as expected
@@ -77,7 +71,6 @@ OpenLayers.Renderer.SVG = OpenLayers.Class(OpenLayers.Renderer.Elements, {
                                                                 arguments);
         this.translationParameters = {x: 0, y: 0};
         this.supportUse = (navigator.userAgent.toLowerCase().indexOf("applewebkit/5") == -1);
-        this.isGecko = (navigator.userAgent.toLowerCase().indexOf("gecko/") != -1);
         
         this.symbolMetrics = {};
     },
@@ -735,7 +728,7 @@ OpenLayers.Renderer.SVG = OpenLayers.Class(OpenLayers.Renderer.Elements, {
         label.setAttributeNS(null, "text-anchor",
             OpenLayers.Renderer.SVG.LABEL_ALIGN[align[0]] || "middle");
 
-        if (this.isGecko) {
+        if (OpenLayers.IS_GECKO === true) {
             label.setAttributeNS(null, "dominant-baseline",
                 OpenLayers.Renderer.SVG.LABEL_ALIGN[align[1]] || "central");
         } else {