Disable UI in chrome://settings/internet and details popup for policy-managed networks.

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 12030 matching lines @@
       </message>
       <message name="IDS_OPTIONS_SETTINGS_JOIN_WIFI_NETWORKS" desc="The title for the dialog to join a wifi network.">
         Join Wi-Fi network
       </message>
       <message name="IDS_OPTIONS_SETTINGS_ADD_VPN" desc="In the settings tab, the text on the button to add a private network.">
         Add private network
       </message>
       <message name="IDS_OPTIONS_SETTINGS_JOIN_VPN" desc="The title for the dialog to join a VPN.">
         Join private network
       </message>
+      <message name="IDS_OPTIONS_SETTINGS_MANAGED_NETWORK" desc="Help text to show in the bubble shown on click of the controlled setting indicator on the internet settings page.">
+        This network is configured by your administrator.
+      </message>
       <message name="IDS_OPTIONS_SETTINGS_USE_SHARED_PROXIES" desc="In the settings tab, the text next to the checkbox for allowing proxy settings for shared networks.">
         Allow proxies for shared networks
       </message>
       <message name="IDS_OPTIONS_SETTINGS_ENABLE_DATA_ROAMING" desc="In the settings tab, the text next to the checkbox for data roaming.">
         Allow mobile data roaming
       </message>
       <message name="IDS_OPTIONS_SETTINGS_IMPORT_NETWORK_SETTINGS" desc="In the settings tab, the text next to the file input selector.">
         Import network settings:
       </message>
       <message name="IDS_OPTIONS_SETTINGS_INVALID_NETWORK_SETTINGS" desc="Dialog when network settings file is of invalid format.">
@@ skipping 2666 matching lines @@
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
   </release>
 </grit>