Don't retry failed attempts to poll sync server

chrome/browser/sync/engine/sync_scheduler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // A class to schedule syncer tasks intelligently.
 #ifndef CHROME_BROWSER_SYNC_ENGINE_SYNC_SCHEDULER_H_
 #define CHROME_BROWSER_SYNC_ENGINE_SYNC_SCHEDULER_H_
 #pragma once
 
 #include <string>
@@ skipping 179 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(SyncSchedulerWhiteboxTest,
                            SaveConfigurationWhileThrottled);
   FRIEND_TEST_ALL_PREFIXES(SyncSchedulerWhiteboxTest,
                            SaveNudgeWhileThrottled);
   FRIEND_TEST_ALL_PREFIXES(SyncSchedulerWhiteboxTest,
                            ContinueClearUserDataUnderAllCircumstances);
   FRIEND_TEST_ALL_PREFIXES(SyncSchedulerWhiteboxTest,
                            ContinueCanaryJobConfig);
   FRIEND_TEST_ALL_PREFIXES(SyncSchedulerWhiteboxTest,
       ContinueNudgeWhileExponentialBackOff);
+  FRIEND_TEST_ALL_PREFIXES(SyncSchedulerTest, TransientPollFailure);
 
   // A component used to get time delays associated with exponential backoff.
   // Encapsulated into a class to facilitate testing.
   class DelayProvider {
    public:
     DelayProvider();
     virtual base::TimeDelta GetDelay(const base::TimeDelta& last_delay);
     virtual ~DelayProvider();
    private:
     DISALLOW_COPY_AND_ASSIGN(DelayProvider);
@@ skipping 199 matching lines @@
   scoped_ptr<Syncer> syncer_;
 
   scoped_ptr<sessions::SyncSessionContext> session_context_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncScheduler);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_SYNC_SCHEDULER_H_