Add test for showing confirmation dialog for unsecure signin

chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
index ec2f2cf50544f5ec0f4d7b9c9fb9694aab00b7d2..3de69ab64f4bf61ba9559dd656647e4f592b3aeb 100644
--- a/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/enrollment_screen_handler.cc
@@ -12,6 +12,7 @@
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
@@ -40,10 +41,6 @@ namespace {
 
 const char kJsScreenPath[] = "login.OAuthEnrollmentScreen";
 
-// Start page of GAIA authentication extension.
-const char kGaiaExtStartPage[] =
-    "chrome-extension://mfffpogegjflfpflabcdkioaeobkgjik/main.html";
-
 // Enrollment step names.
 const char kEnrollmentStepSignin[] = "signin";
 const char kEnrollmentStepSuccess[] = "success";
@@ -591,7 +588,9 @@ void EnrollmentScreenHandler::OnTokenFetched(
 
 void EnrollmentScreenHandler::DoShow() {
   base::DictionaryValue screen_data;
-  screen_data.SetString("signin_url", kGaiaExtStartPage);
+  screen_data.SetString(
+      "signin_url",
+      base::StringPrintf("%s/main.html", extensions::kGaiaAuthExtensionOrigin);
   screen_data.SetString("gaiaUrl", GaiaUrls::GetInstance()->gaia_url().spec());
   screen_data.SetString("enrollment_mode",
                         EnrollmentModeToString(enrollment_mode_));