[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/favicon_cache.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_SESSIONS_FAVICON_CACHE_H_
 #define COMPONENTS_SYNC_SESSIONS_FAVICON_CACHE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 25 matching lines @@
 }
 
 namespace favicon {
 class FaviconService;
 }
 
 namespace history {
 class HistoryService;
 }
 
-namespace browser_sync {
+namespace sync_sessions {
 
 enum IconSize {
   SIZE_INVALID,
   SIZE_16,
   SIZE_32,
   SIZE_64,
   NUM_SIZES
 };
 
 struct SyncedFaviconInfo;
@@ skipping 186 matching lines @@
 
   ScopedObserver<history::HistoryService, history::HistoryServiceObserver>
       history_service_observer_;
 
   // Weak pointer factory for favicon loads.
   base::WeakPtrFactory<FaviconCache> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconCache);
 };
 
-}  // namespace browser_sync
+}  // namespace sync_sessions
 
 #endif  // COMPONENTS_SYNC_SESSIONS_FAVICON_CACHE_H_