[Sync] Introduce SyncedSessionWindow type.

components/sync_sessions/synced_session.cc

 // 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.
 
 #include "components/sync_sessions/synced_session.h"
 
 namespace sync_sessions {
 
+SyncedSessionWindow::SyncedSessionWindow() {}
+
+SyncedSessionWindow::~SyncedSessionWindow() {}
+
+sync_pb::SessionWindow SyncedSessionWindow::ToSyncSessionWindowPB() const {
+  sync_pb::SessionWindow sync_data;
+  sync_data.set_browser_type(window_type);
+  sync_data.set_window_id(wrapped_window.window_id.id());
+  sync_data.set_selected_tab_index(wrapped_window.selected_tab_index);
+
+  for (const auto& tab : wrapped_window.tabs)
+    sync_data.add_tab(tab->tab_id.id());
+
+  return sync_data;
+}
+
 SyncedSession::SyncedSession()
     : session_tag("invalid"), device_type(TYPE_UNSET) {}
 
 SyncedSession::~SyncedSession() {}
 
-sync_pb::SessionHeader SyncedSession::ToSessionHeader() const {
+sync_pb::SessionHeader SyncedSession::ToSyncSessionHeaderPB() const {
   sync_pb::SessionHeader header;
   for (const auto& window_pair : windows) {
     sync_pb::SessionWindow* w = header.add_window();
-    w->CopyFrom(window_pair.second->ToSyncData());
+    w->CopyFrom(window_pair.second->ToSyncSessionWindowPB());
   }
   header.set_client_name(session_name);
   switch (device_type) {
     case SyncedSession::TYPE_WIN:
       header.set_device_type(sync_pb::SyncEnums_DeviceType_TYPE_WIN);
       break;
     case SyncedSession::TYPE_MACOSX:
       header.set_device_type(sync_pb::SyncEnums_DeviceType_TYPE_MAC);
       break;
     case SyncedSession::TYPE_LINUX:
@@ skipping 11 matching lines @@
     case SyncedSession::TYPE_OTHER:
     // Intentionally fall-through
     default:
       header.set_device_type(sync_pb::SyncEnums_DeviceType_TYPE_OTHER);
       break;
   }
   return header;
 }
 
 }  // namespace sync_sessions