[Sync] Fix namespaces for the sync_sessions component.

chrome/browser/ui/webui/ntp/ntp_user_data_logger.cc

 // 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 "chrome/browser/ui/webui/ntp/ntp_user_data_logger.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 171 matching lines @@
   during_startup_ = !AfterStartupTaskUtils::IsBrowserStartupComplete();
 
   // We record metrics about session data here because when this class typically
   // emits metrics it is too late. This session data would theoretically have
   // been used to populate the page, and we want to learn about its state when
   // the NTP is being generated.
   if (contents) {
     ProfileSyncService* sync = ProfileSyncServiceFactory::GetForProfile(
         Profile::FromBrowserContext(contents->GetBrowserContext()));
     if (sync) {
-      browser_sync::SessionsSyncManager* sessions =
-          static_cast<browser_sync::SessionsSyncManager*>(
+      sync_sessions::SessionsSyncManager* sessions =
+          static_cast<sync_sessions::SessionsSyncManager*>(
               sync->GetSessionsSyncableService());
       if (sessions) {
         sync_sessions::SyncSessionsMetrics::RecordYoungestForeignTabAgeOnNTP(
             sessions);
       }
     }
   }
 }
 
 // content::WebContentsObserver override
@@ skipping 39 matching lines @@
 
   has_server_side_suggestions_ = false;
   has_client_side_suggestions_ = false;
   UMA_HISTOGRAM_CUSTOM_COUNTS(
       "NewTabPage.NumberOfTiles", number_of_tiles_, 1, kNumMostVisited,
       kNumMostVisited + 1);
   number_of_tiles_ = 0;
   has_emitted_ = true;
   during_startup_ = false;
 }