Add cr-policy-network-indicator and add to internet settings

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

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-styles/paper-styles.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/network/cr_onc_types.html">
+<link rel="import" href="chrome://resources/cr_elements/v1_0/policy/cr_policy_network_behavior.html">
+<link rel="import" href="chrome://resources/cr_elements/v1_0/policy/cr_policy_network_indicator.html">
 <link rel="import" href="network_property_list.html">
 <link rel="import" href="network_proxy_input.html">
 <link rel="import" href="network_proxy_exclusions.html">
 
 <dom-module id="network-proxy">
   <link rel="import" type="css" href="network_proxy.css">
   <template>
     <div id="outer" class="layout vertical flex">
       <!-- TODO(stevenjb): Use cr-dropdown-menu once available. -->
+      <div class="layout horizontal center" hidden$=
+          "[[!isNetworkPolicyControlled(networkProperties.ProxySettings.Type)]]">
+        <cr-policy-network-indicator
+             property="[[networkProperties.ProxySettings.Type]]">
+        </cr-policy-network-indicator>
+        <span>This proxy is enforced by your administrator.</span>
+      </div>
+
       <div>
-        <select id="selectType" on-change="onTypeChange_">
+        <select id="selectType" on-change="onTypeChange_"
+            disabled$="[[isNetworkPolicyEnforced(networkProperties.ProxySettings.Type)]]">
           <template is="dom-repeat" items="[[proxyTypes_]]">
             <option value="[[item]]">[[proxyTypeDesc_(item)]]</option>
           </template>
         </select>
       </div>
 
       <div hidden$="[[!matches_(proxy.Type, ProxySettingsType.PAC)]]"
           class="layout horizontal">
         <span>Autoconfiguration URL:</span>
         <paper-input no-label-float class="flex" value="{{proxy.PAC}}"
+            disabled="[[isNetworkPolicyEnforced(networkProperties.ProxySettings.PAC)]]">
             on-blur="onProxyInputChange_">
         </paper-input>
       </div>
 
       <div hidden$="[[!matches_(proxy.Type, ProxySettingsType.WPAD)]]"
           class="layout horizontal">
         <span>Web Proxy Auto Discovery URL:</span><span>[[WPAD]]</span>
       </div>
 
       <div hidden$="[[!matches_(proxy.Type, ProxySettingsType.MANUAL)]]"
           class="layout vertical">
         <paper-checkbox id="useUrl" checked="{{useSameProxy}}">
             Use the same proxy for all protocols
         </paper-checkbox>
         <div hidden$="[[!useSameProxy]]" class="layout vertical">
-          <network-proxy-input editable="[[editable]]"
+          <network-proxy-input
+              editable="[[isPropertyEditable_(editable, networkProperties, 'ProxySettings.Manual.HTTPProxy')]]"
               value="{{proxy.Manual.HTTPProxy}}"
               label="Proxy" on-proxy-change="onProxyInputChange_">
           </network-proxy-input>
         </div>
         <div hidden$="[[useSameProxy]]" class="layout vertical">
-          <network-proxy-input editable="[[editable]]"
+          <network-proxy-input
+              editable="[[isPropertyEditable_(editable, networkProperties, 'ProxySettings.Manual.HTTPProxy)')]]"
               value="{{proxy.Manual.HTTPProxy}}"
               label="HTTP Proxy" on-proxy-change="onProxyInputChange_">
           </network-proxy-input>
-          <network-proxy-input editable="[[editable]]"
+          <network-proxy-input
+              editable="[[isPropertyEditable_(editable, networkProperties, 'ProxySettings.Manual.SecureHTTPProxy)')]]"
               value="{{proxy.Manual.SecureHTTPProxy}}"
               label="Secure HTTP Proxy" on-proxy-change="onProxyInputChange_">
           </network-proxy-input>
-          <network-proxy-input editable="[[editable]]"
+          <network-proxy-input
+              editable="[[isPropertyEditable_(editable, networkProperties, 'ProxySettings.Manual.FTPProxy)')]]"
               value="{{proxy.Manual.FTPProxy}}"
               label="FTP Proxy" on-proxy-change="onProxyInputChange_">
           </network-proxy-input>
-          <network-proxy-input editable="[[editable]]"
+          <network-proxy-input
+              editable="[[isPropertyEditable_(editable, networkProperties, 'ProxySettings.Manual.SOCKS)')]]"
               value="{{proxy.Manual.SOCKS}}"
               label="SOCKS host" on-proxy-change="onProxyInputChange_">
           </network-proxy-input>
         </div>
 
         <span>Do not use the proxy settings for these hosts and domains:</span>
         <network-proxy-exclusions exclusions="{{proxy.ExcludeDomains}}"
              on-proxy-change="onProxyExclusionsChange_">
         </network-proxy-exclusions>
         <div class="layout horizontal baseline">
           <paper-input id="proxyExclusion" class="flex" no-label-float>
           </paper-input>
           <paper-button on-tap="onAddProxyExclusion_">
             Add Exception
           </paper-button>
         </div>
       </div>
     </div>
   </template>
   <script src="network_proxy.js"></script>
 </dom-module>