AU: Implement server-dictated poll interval.

update_check_scheduler.h

 // 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.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_CHECK_SCHEDULER_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_UPDATE_CHECK_SCHEDULER_H__
 
 #include <base/basictypes.h>
 #include <glib.h>
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST
@@ skipping 31 matching lines @@
 
   UpdateCheckScheduler(UpdateAttempter* update_attempter);
   virtual ~UpdateCheckScheduler();
 
   // Initiates the periodic update checks, if necessary.
   void Run();
 
   // Sets the new update status. This is invoked by UpdateAttempter.
   void SetUpdateStatus(UpdateStatus status);
 
+  void set_poll_interval(int interval) { poll_interval_ = interval; }
+
  private:
   friend class UpdateCheckSchedulerTest;
   FRIEND_TEST(UpdateCheckSchedulerTest, CanScheduleTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, ComputeNextIntervalAndFuzzBackoffTest);
+  FRIEND_TEST(UpdateCheckSchedulerTest, ComputeNextIntervalAndFuzzPollTest);
+  FRIEND_TEST(UpdateCheckSchedulerTest, ComputeNextIntervalAndFuzzPriorityTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, ComputeNextIntervalAndFuzzTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, GTimeoutAddSecondsTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, IsBootDeviceRemovableTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, IsOfficialBuildTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, RunBootDeviceRemovableTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, RunNonOfficialBuildTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, RunTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, ScheduleCheckDisabledTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, ScheduleCheckEnabledTest);
   FRIEND_TEST(UpdateCheckSchedulerTest, ScheduleCheckNegativeIntervalTest);
@@ skipping 37 matching lines @@
 
   // True if automatic update checks should be scheduled, false otherwise.
   bool enabled_;
 
   // True if there's an update check scheduled already, false otherwise.
   bool scheduled_;
 
   // The timeout interval (before fuzzing) for the last update check.
   int last_interval_;
 
+  // Server dictated poll interval in seconds, if positive.
+  int poll_interval_;
+
   DISALLOW_COPY_AND_ASSIGN(UpdateCheckScheduler);
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_CHECK_SCHEDULER_H__