Chrome OS: Fix Local State initialization check in Time zone resolver.

This Cl fixes a race in Time Zone Resolver Manager when checking if Local State
has been initialized.

Bug: b/64065854
Change-Id: If681dc675e0219fda7c9b37307c7f205394c62fd
Reviewed-on: https://chromium-review.googlesource.com/682734
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504465}

chrome/browser/chromeos/system/timezone_resolver_manager.cc

@@ -122,6 +122,9 @@ ServiceConfiguration GetServiceConfigurationForSigninScreen() {
 }  // anonymous namespace.
 
 TimeZoneResolverManager::TimeZoneResolverManager() : weak_factory_(this) {
+  local_state_initialized_ =
+      g_browser_process->local_state()->GetInitializationStatus() ==
+      PrefService::INITIALIZATION_STATUS_SUCCESS;
   g_browser_process->local_state()->AddPrefInitObserver(
       base::Bind(&TimeZoneResolverManager::OnLocalStateInitialized,
                  weak_factory_.GetWeakPtr()));