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

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 692871f410c5552937b96097b69b358e30d7804c..45a99416c862696d840193e680c4bd9488023f4b 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -12054,6 +12054,9 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <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>