[Sync] Move the last things out of core/.

components/sync/core/shutdown_reason.h

Index: components/sync/core/shutdown_reason.h
diff --git a/components/sync/core/shutdown_reason.h b/components/sync/core/shutdown_reason.h
deleted file mode 100644
index 193bf44d95ddd09a2f1c8789a26e6c0f03827c37..0000000000000000000000000000000000000000
--- a/components/sync/core/shutdown_reason.h
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2014 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 COMPONENTS_SYNC_CORE_SHUTDOWN_REASON_H_
-#define COMPONENTS_SYNC_CORE_SHUTDOWN_REASON_H_
-
-namespace syncer {
-
-// Reason for shutting down sync engine.
-enum ShutdownReason {
-  STOP_SYNC,         // Sync is asked to stop, e.g. due to scarce resource.
-  DISABLE_SYNC,      // Sync is disabled, e.g. user sign out, dashboard clear.
-  BROWSER_SHUTDOWN,  // Browser is closed.
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_CORE_SHUTDOWN_REASON_H_