[Sync] Fix namespaces for the sync_sessions component.

ios/chrome/browser/sync/sessions/ios_chrome_local_session_event_router.mm

 // 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 "ios/chrome/browser/sync/sessions/ios_chrome_local_session_event_router.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/sync_sessions/sync_sessions_client.h"
 #include "components/sync_sessions/synced_tab_delegate.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
 #include "ios/chrome/browser/sync/glue/sync_start_util.h"
 #include "ios/chrome/browser/sync/ios_chrome_synced_tab_delegate.h"
 #include "ios/chrome/browser/tab_parenting_global_observer.h"
 
 namespace {
 
-browser_sync::SyncedTabDelegate* GetSyncedTabDelegateFromWebState(
+sync_sessions::SyncedTabDelegate* GetSyncedTabDelegateFromWebState(
     web::WebState* web_state) {
-  browser_sync::SyncedTabDelegate* delegate =
+  sync_sessions::SyncedTabDelegate* delegate =
       IOSChromeSyncedTabDelegate::FromWebState(web_state);
   return delegate;
 }
 
 }  // namespace
 
 IOSChromeLocalSessionEventRouter::IOSChromeLocalSessionEventRouter(
     ios::ChromeBrowserState* browser_state,
     sync_sessions::SyncSessionsClient* sessions_client,
     const syncer::SyncableService::StartSyncFlare& flare)
@@ skipping 47 matching lines @@
 }
 
 void IOSChromeLocalSessionEventRouter::OnTabParented(web::WebState* web_state) {
   OnWebStateChange(web_state);
 }
 
 void IOSChromeLocalSessionEventRouter::OnWebStateChange(
     web::WebState* web_state) {
   if (web_state->GetBrowserState() != browser_state_)
     return;
-  browser_sync::SyncedTabDelegate* tab =
+  sync_sessions::SyncedTabDelegate* tab =
       GetSyncedTabDelegateFromWebState(web_state);
   if (!tab)
     return;
   if (handler_)
     handler_->OnLocalTabModified(tab);
   if (!tab->ShouldSync(sessions_client_))
     return;
 
   if (!flare_.is_null()) {
     flare_.Run(syncer::SESSIONS);
     flare_.Reset();
   }
 }
 
 void IOSChromeLocalSessionEventRouter::OnFaviconsChanged(
     const std::set<GURL>& page_urls,
     const GURL& icon_url) {
   if (handler_)
     handler_->OnFaviconsChanged(page_urls, icon_url);
 }
 
 void IOSChromeLocalSessionEventRouter::StartRoutingTo(
-    browser_sync::LocalSessionEventHandler* handler) {
+    sync_sessions::LocalSessionEventHandler* handler) {
   DCHECK(!handler_);
   handler_ = handler;
 }
 
 void IOSChromeLocalSessionEventRouter::Stop() {
   handler_ = nullptr;
 }