Added UI to enable debugging features on CrOS

chrome/browser/chromeos/login/help_app_launcher.h

Index: chrome/browser/chromeos/login/help_app_launcher.h
diff --git a/chrome/browser/chromeos/login/help_app_launcher.h b/chrome/browser/chromeos/login/help_app_launcher.h
index 33d769a600021b3bc73c17541d9e1ba1c88559eb..03aaadde48bdfe7d80209f70f964588345a25f1c 100644
--- a/chrome/browser/chromeos/login/help_app_launcher.h
+++ b/chrome/browser/chromeos/login/help_app_launcher.h
@@ -38,6 +38,10 @@ class HelpAppLauncher : public base::RefCountedThreadSafe<HelpAppLauncher> {
     HELP_ENTERPRISE = 2535613,
     // Shown at reset screen as "Learn more" about powerwash/rollback options.
     HELP_POWERWASH = 183084,
+    // Shown at enable debugging screen as "Learn more" about developer options.
+    // TODO(zelidrag): http://crbug.com/431950, show the link once we
+    // create HC article.
+    HELP_ENABLE_DEBUGGING = -1,
   };
 
   // Parent window is used to show dialog.