Add tooltips to cr-policy-indicator

chrome/common/extensions/api/settings_private.idl

Index: chrome/common/extensions/api/settings_private.idl
diff --git a/chrome/common/extensions/api/settings_private.idl b/chrome/common/extensions/api/settings_private.idl
index 161e1bc4f507b054b935bce3c560f339712a2e0b..17a2be79289e7cde18b8f13a7bbcf47c702bec6c 100644
--- a/chrome/common/extensions/api/settings_private.idl
+++ b/chrome/common/extensions/api/settings_private.idl
@@ -34,6 +34,11 @@ namespace settingsPrivate {
     // policy.
     PolicySource? policySource;
 
+    // The owner name if policySource == OWNER.
+    // The primary user name if policySource == PRIMARY_USER.
+    // The extension name if policySource == EXTENSION.
+    DOMString? policySourceName;
+
     // The policy enforcement of the pref; must be specified if policySource is
     // also present.
     PolicyEnforcement? policyEnforcement;