Add aliases to bot-page and refactor duplicated code

appengine/swarming/elements/res/imp/tasklist/task-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 154 matching lines @@
           });
         });
 
         // Turn the Map<Object,Map<Boolean>> into a Map<Object,Array<String>>
         // with all of the aliases applied.
         var pMap = {};
         for (key in map) {
           var values = Object.keys(map[key]);
           if (swarming.alias.DIMENSIONS_WITH_ALIASES.indexOf(key) === -1) {
             pMap[key] = values;
-          } else if (key === "gpu") {
-            var gpus = [];
-            values.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 (key === "device_type") {
-            var devs = [];
-            values.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 = [];
+            values.forEach(function(value){
+              aliased.push(swarming.alias.apply(value, key));
+            });
+            pMap[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["user"].push("none");
 
         // Custom filter options
@@ skipping 57 matching lines @@
           if (t.duration){
             t.human_duration = sk.human.strDuration(t.duration);
           }
         });
         return this._list.items;
       }
     });
   })();
   </script>
 </dom-module>