Add DeviceADPolicyManager to provide AD policy.

components/policy_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <grit-part>
 
   <message name="IDS_POLICY_DM_STATUS_SUCCESS" desc="Message indicating a successful device management server call.">
     Request succeeded
   </message>
   <message name="IDS_POLICY_DM_STATUS_REQUEST_INVALID" desc="Message indicating a bad request to the enterprise server.">
     Invalid request or request parameters
   </message>
   <message name="IDS_POLICY_DM_STATUS_REQUEST_FAILED" desc="Message indicating the request to the enterprise server failed in the network.">
@@ skipping 319 matching lines @@
   </message>
   <message name="IDS_POLICY_INVALID_BOOKMARK" desc="Text displayed in the status column when an entry of the ManagedBookmarks policy is not a valid bookmark.">
     Ignored invalid bookmark at index <ph name="ENTRY_INDEX">$1<ex>3</ex></ph>
   </message>
   <message name="IDS_POLICY_SOURCE_ENTERPRISE_DEFAULT" desc="Indicates that a policy is set by default in an enterprise environment and can be overridden (for Chrome OS only).">
     Enterprise default
   </message>
   <message name="IDS_POLICY_SOURCE_CLOUD" desc="Indicates that the policy originates from the cloud.">
     Cloud
   </message>
+  <message name="IDS_POLICY_SOURCE_ACTIVE_DIRECTORY" desc="Indicates that the policy originates from Active Directory.">
+    Microsoft® Active Directory®
+  </message>
   <message name="IDS_POLICY_SOURCE_PLATFORM" desc="Indicates that the policy is obtained from the local OS.">
     Platform
   </message>
   <message name="IDS_POLICY_SOURCE_PUBLIC_SESSION_OVERRIDE" desc="Indicates that the policy is set programmatically because of an active public session (for Chrome OS only). It could have overridden other sources that set this policy.">
     Public session override
   </message>
   <message name="IDS_POLICY_RISK_TAG_FULL_ADMIN_ACCESS" desc="Title of a group/tag whose policies potentially allow the administrator to access all of a user's data.">
     Full Admin Access
   </message>
   <message name="IDS_POLICY_RISK_TAG_SYSTEM_SECURITY" desc="Title of a group/tag whose policies might influence the system's security.">
     System Security
   </message>
   <message name="IDS_POLICY_RISK_TAG_WEBSITE_SHARING" desc="Title of a group/tag whose policies might lead to information sharing with other websites.">
     Sharing with Websites
   </message>
   <message name="IDS_POLICY_RISK_TAG_ADMIN_SHARING" desc="Title of a group/tag whose policies potentially allow sending information about the user (like activity times) to an administrator.">
     Sharing with Administrator
   </message>
   <message name="IDS_POLICY_RISK_TAG_FILTERING" desc="Title of a group/tag whose policies might restrict web contents which would be visible otherwise (e.g. forced SafeSearch).">
     Filtering
   </message>
   <message name="IDS_POLICY_RISK_TAG_LOCAL_DATA_ACCESS" desc="Title of a group/tag whose policies might allow storage of user data to local drives where others might access them.">
     Local Data Access
   </message>
   <message name="IDS_POLICY_RISK_TAG_GOOGLE_SHARING" desc="Title of a group/tag whose policies enable functionality that might share user data with trusted Google services.">
     Sharing with Google
   </message>
 </grit-part>