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..eecc94ba462bfac067bf21165bb7387aebee15a9 100644
--- a/chrome/common/extensions/api/settings_private.idl
+++ b/chrome/common/extensions/api/settings_private.idl
@@ -41,6 +41,11 @@ namespace settingsPrivate {
     // The recommended value if policyEnforcement == RECOMMENDED.
     any? recommendedValue;
 
+    // The owner name if policySource == OWNER.
+    // The primary user name if policySource == PRIMARY_USER.
+    // The extension name if policySource == EXTENSION.
+    DOMString? policySourceName;
+
     // The extension ID if policySource == EXTENSION.
     DOMString? extensionId;