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/Popup.js

@@ -337,7 +337,7 @@ OpenLayers.Popup = OpenLayers.Class({
         }
         
         //listen to movestart, moveend to disable overflow (FF bug)
-        if (!this.disableFirefoxOverflowHack && OpenLayers.Util.getBrowserName() == 'firefox') {
+        if (!this.disableFirefoxOverflowHack && OpenLayers.BROWSER_NAME == 'firefox') {
             this.map.events.register("movestart", this, function() {
                 var style = document.defaultView.getComputedStyle(
                     this.contentDiv, null
@@ -478,7 +478,7 @@ OpenLayers.Popup = OpenLayers.Class({
         //now if our browser is IE, we need to actually make the contents 
         // div itself bigger to take its own padding into effect. this makes 
         // me want to shoot someone, but so it goes.
-        if (OpenLayers.Util.getBrowserName() == "msie") {
+        if (OpenLayers.BROWSER_NAME == "msie") {
             this.contentSize.w += 
                 contentDivPadding.left + contentDivPadding.right;
             this.contentSize.h +=