[Sync] Introduce SyncedSessionWindow type.

chrome/browser/sync/test/integration/performance/sessions_sync_perf_test.cc

 // Copyright (c) 2011 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 "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/sync/test/integration/performance/sync_timing_helper.h"
 #include "chrome/browser/sync/test/integration/profile_sync_service_harness.h"
 #include "chrome/browser/sync/test/integration/sessions_helper.h"
 #include "chrome/browser/sync/test/integration/sync_test.h"
@@ skipping 80 matching lines @@
   if (!GetSessionData(profile, &sessions)) {
     // Foreign session data may be empty.  In this case we only count tabs in
     // the local session.
     DVLOG(1) << "GetSessionData returned false";
   }
 
   int tab_count = 0;
   sessions.push_back(local_session);
   for (auto* session : sessions)
     for (const auto& win_pair : session->windows)
-      tab_count += win_pair.second->tabs.size();
+      tab_count += win_pair.second->wrapped_window.tabs.size();
 
   return tab_count;
 }
 
 GURL SessionsSyncPerfTest::NextURL() {
   return IntToURL(url_number_++);
 }
 
 GURL SessionsSyncPerfTest::IntToURL(int n) {
   return GURL(base::StringPrintf("http://localhost/%d", n));
@@ skipping 15 matching lines @@
   ASSERT_EQ(kNumTabs, GetTabCount(1));
   PrintResult("tabs", "update_tabs", dt);
 
   RemoveTabs(0);
   dt = TimeMutualSyncCycle(GetClient(0), GetClient(1));
   // New tab page remains open on profile 0 after closing all tabs.
   ASSERT_EQ(1, GetTabCount(0));
   ASSERT_EQ(0, GetTabCount(1));
   PrintResult("tabs", "delete_tabs", dt);
 }