Add network proxy input to md-settings internet details

chrome/browser/resources/settings/internet_page/internet_detail_page.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_checkbox/cr_checkbox.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_collapse/cr_collapse.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_onc/cr_onc_types.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_network_icon/cr_network_icon.html">
 <link rel="import" href="network_ip_config.html">
 <link rel="import" href="network_nameservers.html">
 <link rel="import" href="network_property_list.html">
+<link rel="import" href="network_proxy.html">
 
 <dom-module id="cr-settings-internet-detail-page">
   <link rel="import" type="css" href="chrome://md-settings/settings_page/settings_page.css">
   <link rel="import" type="css" href="internet_detail_page.css">
   <template>
     <paper-material class="layout vertical">
       <div id="outerDiv" class="layout vertical">
         <div id="titleDiv" class="layout horizontal">
           <div class="layout center horizontal flex">
             <cr-network-icon id="networkIcon" network-state="[[networkState]]">
@@ skipping 45 matching lines @@
 
           <div id="advancedDiv" class="layout vertical"
               hidden$="[[!hasAdvancedOrDeviceFields_(networkState)]]">
             <cr-collapse opened="[[advancedExpanded]]">
               <network-property-list
                   fields="[[getAdvancedFields_(networkState)]]"
                   network-state="[[networkState]]">
               </network-property-list>
 
               <div class="layout vertical"
+                  hidden$="[[!hasNetworkSection_(networkState)]]">
+                <cr-button toggles active="{{proxyExpanded}}">
+                  Proxy
+                </cr-button>
+                <cr-collapse opened="[[proxyExpanded]]">
+                  <div id="proxyDiv" class="layout vertical flex">
+                    <network-proxy editable
+                        network-state="[[networkState]]"
+                        on-changed="onProxyChanged_">
+                    </network-proxy>
+                  </div>
+                </cr-collapse>
+              </div>
+
+              <div class="layout vertical"
                   hidden$="[[!hasDeviceFields_(networkState)]]">
                 <cr-button toggles active="{{deviceExpanded}}">
                   Device
                 </cr-button>
                 <cr-collapse opened="[[deviceExpanded]]">
                   <network-property-list
                       fields="[[getDeviceFields_(networkState)]]"
                       network-state="[[networkState]]">
                   </network-property-list>
                 </cr-collapse>
               </div>
             </cr-collapse>
           </div>
         </div>
       </div>
     </paper-shadow>
   </template>
   <script src="internet_detail_page.js"></script>
 </dom-module>