Move net.html import down into the modules that use it

Tools/GardeningServer/ui/ct-sheriff-o-matic.html

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <script src="../bower_components/sugar/release/sugar-full.development.js"></script>
 <script src="../scripts/results.js"></script>
 
 <link rel="import" href="../bower_components/core-animated-pages/core-animated-pages.html">
 <link rel="import" href="../bower_components/core-animated-pages/transitions/slide-from-right.html">
-<link rel="import" href="../lib/net.html">
 <link rel="import" href="ct-results-panel.html">
 <link rel="import" href="ct-unexpected-failures.html">
 
 <polymer-element name="ct-sheriff-o-matic">
   <template>
     <style>
       :host {
         display: flex;
         flex-direction: column;
         height: 100%;
@@ skipping 61 matching lines @@
         this.selected = 0;
       },
 
       onExamine: function(event) {
         this.currentFailures = event.detail.failures;
         this.selected = 1;
       },
     });
   </script>
 </polymer-element>