Add return values to SyncerCommand

chrome/browser/sync/engine/get_commit_ids_command.cc

Index: chrome/browser/sync/engine/get_commit_ids_command.cc
diff --git a/chrome/browser/sync/engine/get_commit_ids_command.cc b/chrome/browser/sync/engine/get_commit_ids_command.cc
index 720c063f23d13663a8e7cc5f34ec3340dbbb7203..fcdbdb69b02fc9cca1873925bae5a5aeedb14390 100644
--- a/chrome/browser/sync/engine/get_commit_ids_command.cc
+++ b/chrome/browser/sync/engine/get_commit_ids_command.cc
@@ -29,7 +29,7 @@ GetCommitIdsCommand::GetCommitIdsCommand(int commit_batch_size)
 
 GetCommitIdsCommand::~GetCommitIdsCommand() {}
 
-void GetCommitIdsCommand::ExecuteImpl(SyncSession* session) {
+SyncerError GetCommitIdsCommand::ExecuteImpl(SyncSession* session) {
   // Gather the full set of unsynced items and store it in the session. They
   // are not in the correct order for commit.
   syncable::Directory::UnsyncedMetaHandles all_unsynced_handles;
@@ -65,6 +65,7 @@ void GetCommitIdsCommand::ExecuteImpl(SyncSession* session) {
     DVLOG(1) << "Debug commit batch result:" << verified_commit_ids[i];
 
   status->set_commit_set(*ordered_commit_set_.get());
+  return NO_ERROR;
 }
 
 namespace {