Apply default wallpaper from customization manifest.

chrome/browser/chromeos/login/wizard_controller.cc

Index: chrome/browser/chromeos/login/wizard_controller.cc
diff --git a/chrome/browser/chromeos/login/wizard_controller.cc b/chrome/browser/chromeos/login/wizard_controller.cc
index 059084e5e1c9c418ca2c590b811ad0226ad7c212..3f7d53418632c94ba75ceaae704eda0fa64d148c 100644
--- a/chrome/browser/chromeos/login/wizard_controller.cc
+++ b/chrome/browser/chromeos/login/wizard_controller.cc
@@ -652,6 +652,10 @@ void WizardController::PerformPostEulaActions() {
       base::Bind(&WizardController::StartTimezoneResolve,
                  weak_factory_.GetWeakPtr()),
       base::TimeDelta::FromMilliseconds(kDefaultNetworkRetryDelayMS));
+  DelayNetworkCall(
+      ServicesCustomizationDocument::GetInstance()
+          ->EnsureCustomizationAppliedClosure(),
+      base::TimeDelta::FromMilliseconds(kDefaultNetworkRetryDelayMS));
 
   // Now that EULA has been accepted (for official builds), enable portal check.
   // ChromiumOS builds would go though this code path too.