Add aliases to bot-page and refactor duplicated code

appengine/swarming/elements/res/imp/botlist/bot-list-data.html

 <!--
   Copyright 2016 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
 
   This in an HTML Import-able file that contains the definition
   of the following elements:
 
     <bot-list-data>
 
@@ skipping 208 matching lines @@
         // pMap will have a list of columns to available values (primary key
         // to secondary values). This includes bot dimensions, but also
         // includes state like disk_space, quarantined, busy, etc.
         dimensions = dimensions.bots_dimensions;
 
         var pMap = {};
         dimensions.forEach(function(d){
           if (swarming.alias.DIMENSIONS_WITH_ALIASES.indexOf(d.key) === -1) {
             // value is an array of all seen values for the dimension d.key
             pMap[d.key] = d.value;
-          } else if (d.key === "gpu") {
-            var gpus = [];
-            d.value.forEach(function(g){
-              var alias = swarming.alias.gpu(g);
-              if (alias !== "unknown") {
-                gpus.push(swarming.alias.apply(g, alias));
-              } else {
-                gpus.push(g);
-              }
-            }.bind(this));
-            pMap["gpu"] = gpus;
-          } else if (d.key === "device_type") {
-            var devs = [];
-            d.value.forEach(function(dt){
-              var alias = swarming.alias.android(dt);
-              if (alias !== "unknown") {
-                devs.push(swarming.alias.apply(dt, alias));
-              } else {
-                devs.push(dt);
-              }
-            }.bind(this));
-            pMap["device_type"] = devs;
           } else {
-            console.log("Unknown alias type: ", d);
+            var aliased = [];
+            d.value.forEach(function(value){
+              aliased.push(swarming.alias.apply(value, d.key));
+            });
+            pMap[d.key] = aliased;
           }
         });
 
         // Add some options that might not show up.
         pMap["android_devices"].push("0");
         pMap["device_os"].push("none");
         pMap["device_type"].push("none");
 
         pMap["id"] = [];
 
@@ skipping 13 matching lines @@
           return;
         }
         this._getJsonAsync("_list", "/_ah/api/swarming/v1/bots/list",
           "_busy1", this.auth_headers, this.query_params);
       },
 
     });
   })();
   </script>
 </dom-module>