Refresh policies from DM server periodically

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 1952747394c6fbb36c3c29e0147414f002e2f15f..e6fb7c8b5eb0e628a8fa30451bc1977fbd5c298a 100644
--- a/chrome/browser/policy/device_token_fetcher.cc
+++ b/chrome/browser/policy/device_token_fetcher.cc
@@ -87,11 +87,21 @@ void DeviceTokenFetcher::OnError(DeviceManagementBackend::ErrorCode code) {
   if (code == DeviceManagementBackend::kErrorServiceManagementNotSupported) {
     device_token_ = std::string();
     device_id_ = std::string();
-    file_util::Delete(token_path_, false);
+    BrowserThread::PostTask(
+        BrowserThread::FILE,
+        FROM_HERE,
+        NewRunnableFunction(&file_util::Delete, token_path_, false));
   }
   SetState(kStateFailure);
 }
 
+void DeviceTokenFetcher::Restart() {
+  DCHECK(!IsTokenPending());
+  device_token_.clear();
+  device_token_load_complete_event_.Reset();
+  MakeReadyToRequestDeviceToken();
+}
+
 void DeviceTokenFetcher::StartFetching() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (state_ == kStateNotStarted) {
@@ -186,12 +196,10 @@ void DeviceTokenFetcher::SetState(FetcherState state) {
   state_ = state;
   if (state == kStateFailure) {
     device_token_load_complete_event_.Signal();
+    NotifyTokenError();
   } else if (state == kStateHasDeviceToken) {
     device_token_load_complete_event_.Signal();
-    NotificationService::current()->Notify(
-        NotificationType::DEVICE_TOKEN_AVAILABLE,
-        Source<DeviceTokenFetcher>(this),
-        NotificationService::NoDetails());
+    NotifyTokenSuccess();
   }
 }