[cros] Support global carrier config.

chrome/browser/chromeos/login/base_login_display_host.cc

Index: chrome/browser/chromeos/login/base_login_display_host.cc
diff --git a/chrome/browser/chromeos/login/base_login_display_host.cc b/chrome/browser/chromeos/login/base_login_display_host.cc
index e1df84987ddd4405bc8ad0a4b1ec45558cb91456..a0db57ac75c685bc265b03cd9dc19521ba911592 100644
--- a/chrome/browser/chromeos/login/base_login_display_host.cc
+++ b/chrome/browser/chromeos/login/base_login_display_host.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/chromeos/login/views_login_display_host.h"
 #include "chrome/browser/chromeos/login/webui_login_display_host.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
+#include "chrome/browser/chromeos/mobile_config.h"
 #include "chrome/browser/chromeos/system/timezone_settings.h"
 #include "chrome/browser/chromeos/wm_ipc.h"
 #include "chrome/browser/policy/browser_policy_connector.h"
@@ -188,6 +189,9 @@ void BaseLoginDisplayHost::StartSignInScreen() {
   // Initiate services customization manifest fetching.
   ServicesCustomizationDocument::GetInstance()->StartFetching();
 
+  // Initiate mobile config load.
+  MobileConfig::GetInstance();
+
   // Initiate device policy fetching.
   g_browser_process->browser_policy_connector()->ScheduleServiceInitialization(
       kPolicyServiceInitializationDelayMilliseconds);