[Sync] Add client-side plumbing for server control of sessions commit delay

chrome/browser/sync/engine/syncer.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/syncer.h"
 
 #include "base/message_loop.h"
 #include "base/time.h"
 #include "base/tracked.h"
 #include "chrome/browser/sync/engine/apply_updates_command.h"
@@ skipping 294 matching lines @@
         command.max_commit_batch_size());
   }
   if (command.has_set_sync_long_poll_interval()) {
     session->delegate()->OnReceivedLongPollIntervalUpdate(
         TimeDelta::FromSeconds(command.set_sync_long_poll_interval()));
   }
   if (command.has_set_sync_poll_interval()) {
     session->delegate()->OnReceivedShortPollIntervalUpdate(
         TimeDelta::FromSeconds(command.set_sync_poll_interval()));
   }
+
+  if (command.has_sessions_commit_delay_seconds()) {
+    session->delegate()->OnReceivedSessionsCommitDelay(
+        TimeDelta::FromSeconds(command.sessions_commit_delay_seconds()));
+  }
 }
 
 void CopyServerFields(syncable::Entry* src, syncable::MutableEntry* dest) {
   dest->Put(SERVER_NON_UNIQUE_NAME, src->Get(SERVER_NON_UNIQUE_NAME));
   dest->Put(SERVER_PARENT_ID, src->Get(SERVER_PARENT_ID));
   dest->Put(SERVER_MTIME, src->Get(SERVER_MTIME));
   dest->Put(SERVER_CTIME, src->Get(SERVER_CTIME));
   dest->Put(SERVER_VERSION, src->Get(SERVER_VERSION));
   dest->Put(SERVER_IS_DIR, src->Get(SERVER_IS_DIR));
   dest->Put(SERVER_IS_DEL, src->Get(SERVER_IS_DEL));
   dest->Put(IS_UNAPPLIED_UPDATE, src->Get(IS_UNAPPLIED_UPDATE));
   dest->Put(SERVER_SPECIFICS, src->Get(SERVER_SPECIFICS));
   dest->Put(SERVER_POSITION_IN_PARENT, src->Get(SERVER_POSITION_IN_PARENT));
 }
 
 void ClearServerData(syncable::MutableEntry* entry) {
   entry->Put(SERVER_NON_UNIQUE_NAME, "");
   entry->Put(SERVER_PARENT_ID, syncable::kNullId);
   entry->Put(SERVER_MTIME, 0);
   entry->Put(SERVER_CTIME, 0);
   entry->Put(SERVER_VERSION, 0);
   entry->Put(SERVER_IS_DIR, false);
   entry->Put(SERVER_IS_DEL, false);
   entry->Put(IS_UNAPPLIED_UPDATE, false);
   entry->Put(SERVER_SPECIFICS, sync_pb::EntitySpecifics::default_instance());
   entry->Put(SERVER_POSITION_IN_PARENT, 0);
 }
 
 }  // namespace browser_sync