Show the managed user passphrase dialog when clicking unlock.

chrome/browser/ui/webui/extensions/extension_settings_handler.h

Index: chrome/browser/ui/webui/extensions/extension_settings_handler.h
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_handler.h b/chrome/browser/ui/webui/extensions/extension_settings_handler.h
index c85c6bf68c48ab0e3ea811242d251f117c1d4fc1..f4782d9e8e87dfce62f7c7166026c5f3dd6d172a 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_handler.h
+++ b/chrome/browser/ui/webui/extensions/extension_settings_handler.h
@@ -133,6 +133,10 @@ class ExtensionSettingsHandler
   // Callback for "setElevated" message.
   void ManagedUserSetElevated(const base::ListValue* args);
 
+  // If the authentication of the managed user was successful,
+  // it gives this information back to the UI.
+  void PassphraseDialogCallback(bool success);
+
   // Callback for "requestExtensionsData" message.
   void HandleRequestExtensionsData(const base::ListValue* args);