Add API on host registration page.

chrome/browser/chromeos/login/registration_screen.cc

Index: chrome/browser/chromeos/login/registration_screen.cc
diff --git a/chrome/browser/chromeos/login/registration_screen.cc b/chrome/browser/chromeos/login/registration_screen.cc
index 40348d7a6d9069950ffe5b2c3b772c4cd3309dc6..79d2b45a2d988b8436f1b9126a4a3e5dbc507279 100644
--- a/chrome/browser/chromeos/login/registration_screen.cc
+++ b/chrome/browser/chromeos/login/registration_screen.cc
@@ -106,9 +106,11 @@ void RegistrationScreen::OnPageLoadFailed(const std::string& url) {
                                          PageTransition::Type transition) {
   if (url.spec() == kRegistrationSuccessUrl) {
     source->Stop();
+    LOG(INFO) << "Registration form completed.";
     CloseScreen(ScreenObserver::REGISTRATION_SUCCESS);
   } else if (url.spec() == kRegistrationSkippedUrl) {
     source->Stop();
+    LOG(INFO) << "Registration form skipped.";
     CloseScreen(ScreenObserver::REGISTRATION_SKIPPED);
   } else {
     source->Stop();