sync: Loop committing items without downloading updates (v2)

sync/engine/commit.h

Index: sync/engine/commit.h
diff --git a/sync/engine/commit.h b/sync/engine/commit.h
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+++ b/sync/engine/commit.h
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+// 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.
+
+#ifndef SYNC_ENGINE_COMMIT_H_
+#define SYNC_ENGINE_COMMIT_H_
+#pragma once
+
+#include "sync/util/syncer_error.h"
+
+namespace browser_sync {
+
+namespace sessions {
+class SyncSession;
+}
+
+class Syncer;
+
+// This function will commit batches of unsynced items to the server until the
+// number of unsynced and ready to commit items reaches zero or an error is
+// encountered.  A request to exit early will be treated as an error and will
+// abort any blocking operations.
+//
+// The Syncer parameter is provided only for access to its ExitRequested()
+// method.  This is technically unnecessary since an early exit request should
+// be detected as we attempt to contact the sync server.
+//
+// The SyncSession parameter contains pointers to various bits of state,
+// including the syncable::Directory that contains all sync items and the
+// ServerConnectionManager used to contact the server.
+SyncerError BuildAndPostCommits(
+    Syncer* syncer,
+    sessions::SyncSession* session);
+
+}  // namespace browser_sync
+
+#endif  // SYNC_ENGINE_COMMIT_H_