[Sync] Componentize synced_tab_delegate

components/sync_sessions/sync_sessions_client.cc

Index: components/sync_sessions/sync_sessions_client.cc
diff --git a/components/sync_sessions/sync_sessions_client.cc b/components/sync_sessions/sync_sessions_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..91ef3b8787dbe5c45486ff4b807f747edbaf8df9
--- /dev/null
+++ b/components/sync_sessions/sync_sessions_client.cc
@@ -0,0 +1,12 @@
+// Copyright 2015 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_sessions/sync_sessions_client.h"
+
+namespace sync_sessions {
+
+SyncSessionsClient::SyncSessionsClient() {}
+SyncSessionsClient::~SyncSessionsClient() {}
+
+}  // namespace sync_sessions