AU: Implement server-dictated poll interval.

update_attempter.cc

Index: update_attempter.cc
diff --git a/update_attempter.cc b/update_attempter.cc
index 694e7748178669f609c1db5d1fdebf9f8a764a81..a1568a923d266cd64bae69e890351eec93616568 100644
--- a/update_attempter.cc
+++ b/update_attempter.cc
@@ -297,6 +297,12 @@ void UpdateAttempter::ActionCompleted(ActionProcessor* processor,
     // If the request is not an event, then it's the update-check.
     if (!omaha_request_action->IsEvent()) {
       http_response_code_ = omaha_request_action->GetHTTPResponseCode();
+      // Forward the server-dictated poll interval to the update check
+      // scheduler, if any.
+      if (update_check_scheduler_) {
+        update_check_scheduler_->set_poll_interval(
+            omaha_request_action->GetOutputObject().poll_interval);
+      }
     }
   }
   if (code != kActionCodeSuccess) {