[Sync] Move sessions files from sync_driver to sync_sessions.

components/sync_driver/open_tabs_ui_delegate.cc

Index: components/sync_driver/open_tabs_ui_delegate.cc
diff --git a/components/sync_driver/open_tabs_ui_delegate.cc b/components/sync_driver/open_tabs_ui_delegate.cc
deleted file mode 100644
index 86e0e72851055121760005b7708a05e7671fce38..0000000000000000000000000000000000000000
--- a/components/sync_driver/open_tabs_ui_delegate.cc
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2013 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 "components/sync_driver/open_tabs_ui_delegate.h"
-
-namespace sync_driver {
-
-OpenTabsUIDelegate::~OpenTabsUIDelegate() {
-}
-
-}  // namespace sync_driver