Refactor out reusable pieces from new Botlist

appengine/swarming/elements/res/imp/common/swarming-app.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:
 
     <swarming-app>
 
   <swarming-app> is meant to be used in top level elements to provide the header
       toolbar and authentication.
 
   It contains the definition of the following style modules:
 
     swarming-app-style
 
   <style include="shared-style"> contains styles to be shared among all
       apps, such as colors.
 
+  It contains the definition of the following Behaviors:
+
+    SwarmingBehaviors.SwarmingBehavior
+
+  To use it, include
+      behaviors: [SwarmingBehaviors.SwarmingBehavior]
+  in the creation of any Polymer element.
+
+  SwarmingBehaviors.SwarmingBehavior contains shared functions to ease
+  templating, such as _or() and _not().
+
   Properties:
     auth_headers: Object, Use this in iron-ajax to set oauth2 headers.
     busy: Boolean, If the busy spinner should be active.
     name: String, the name of the app to be displayed.
 
   Methods:
     None.
 
   Events:
     None.
@@ skipping 97 matching lines @@
 <dom-module id="swarming-app-style">
   <style>
       * {
         font-family: sans-serif;
       }
       /* Only style anchor tags that are actually linking somewhere.*/
       a[href] {
         color: #1F78B4;
       }
   </style>
-</dom-module>
+</dom-module>
+
+<script>
+  window.SwarmingBehaviors = window.SwarmingBehaviors || {};
+  (function(){
+    // This behavior wraps up all the shared swarming functionality.
+    SwarmingBehaviors.SwarmingBehavior = {
+
+      _not: function(a) {
+        return !a;
+      },
+
+      _or: function() {
+        var result = false;
+        // can't use .foreach, as arguments isn't really a function.

[jcgregorio, 2016/08/16 12:09:27]

isn't really an Array.

[kjlubick, 2016/08/16 12:29:46]

Fixed.

+        for (var i = 0; i < arguments.length; i++) {
+          result = result || arguments[i];
+        }
+        return result;
+      },
+    };
+  })();
+</script>