AU: Implement server-dictated poll interval.

update_attempter.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "update_engine/update_attempter.h"
 
 // From 'man clock_gettime': feature test macro: _POSIX_C_SOURCE >= 199309L
 #ifndef _POSIX_C_SOURCE
 #define _POSIX_C_SOURCE 199309L
 #endif  // _POSIX_C_SOURCE
@@ skipping 279 matching lines @@
   if (type == DownloadAction::StaticType()) {
     download_progress_ = 0.0;
     DownloadAction* download_action = dynamic_cast<DownloadAction*>(action);
     http_response_code_ = download_action->GetHTTPResponseCode();
   } else if (type == OmahaRequestAction::StaticType()) {
     OmahaRequestAction* omaha_request_action =
         dynamic_cast<OmahaRequestAction*>(action);
     // 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) {
     // On failure, schedule an error event to be sent to Omaha.
     CreatePendingErrorEvent(action, code);
     return;
   }
   // Find out which action completed.
   if (type == OmahaResponseHandlerAction::StaticType()) {
     // Note that the status will be updated to DOWNLOADING when some
@@ skipping 167 matching lines @@
     SetPriority(utils::kProcessPriorityNormal);
     return true;
   }
   // Set the priority to high and let GLib destroy the timeout source.
   SetPriority(utils::kProcessPriorityHigh);
   manage_priority_source_ = NULL;
   return false;
 }
 
 }  // namespace chromeos_update_engine