Simulate transient error and verify exponential backoff.

chrome/browser/sync/engine/process_updates_command.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/sync/engine/process_updates_command.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/tracked.h"
@@ skipping 49 matching lines @@
         break;
       default:
         NOTREACHED();
         break;
     }
   }
 
   status->set_num_consecutive_errors(0);
 
   status->mutable_update_progress()->ClearVerifiedUpdates();
-
-  // TODO(nick): The following line makes no sense to me.
-  status->set_syncing(true);
   return;
 }
 
 namespace {
 // Returns true if the entry is still ok to process.
 bool ReverifyEntry(syncable::WriteTransaction* trans, const SyncEntity& entry,
                    syncable::MutableEntry* same_id) {
 
   const bool deleted = entry.has_deleted() && entry.deleted();
   const bool is_directory = entry.IsFolder();
@@ skipping 75 matching lines @@
     // If these don't match, it means that we have a different view of the
     // truth from other clients.  That's a sync bug, though we may be able
     // to recover the next time this item commits.
     LOG_IF(ERROR, !SyncerUtil::ServerAndLocalEntriesMatch(&target_entry))
         << target_entry;
   }
   return SUCCESS_PROCESSED;
 }
 
 }  // namespace browser_sync