UserPolicyCache only becomes ready after policy has been fetched.

chrome/browser/policy/device_token_fetcher.cc

Index: chrome/browser/policy/device_token_fetcher.cc
diff --git a/chrome/browser/policy/device_token_fetcher.cc b/chrome/browser/policy/device_token_fetcher.cc
index bc565b05f80b567ce9113652048aa5151a9a8b96..e96b4fb424be0da391b2a7d808ba1bb8cd42401d 100644
--- a/chrome/browser/policy/device_token_fetcher.cc
+++ b/chrome/browser/policy/device_token_fetcher.cc
@@ -224,6 +224,10 @@ void DeviceTokenFetcher::SetState(FetcherState state) {
     scheduler_->PostDelayedWork(
         base::Bind(&DeviceTokenFetcher::DoWork, base::Unretained(this)), delay);
   }
+
+  // Inform the cache if a token fetch attempt has failed.
+  if (state_ != STATE_INACTIVE && state_ != STATE_TOKEN_AVAILABLE)
+    cache_->SetFetchingDone();
 }
 
 void DeviceTokenFetcher::DoWork() {