[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/tab_node_pool.cc

 // Copyright 2014 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/tab_node_pool.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "components/sync/api/sync_change.h"
 #include "components/sync/api/sync_data.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/protocol/session_specifics.pb.h"
 #include "components/sync/protocol/sync.pb.h"
 
-namespace browser_sync {
+namespace sync_sessions {
 
 const size_t TabNodePool::kFreeNodesLowWatermark = 25;
 const size_t TabNodePool::kFreeNodesHighWatermark = 100;
 
 TabNodePool::TabNodePool() : max_used_tab_node_id_(kInvalidTabNodeID) {}
 
 // static
 // We start vending tab node IDs at 0.
 const int TabNodePool::kInvalidTabNodeID = -1;
 
@@ skipping 145 matching lines @@
 }
 
 bool TabNodePool::Full() {
   return nodeid_tabid_map_.empty();
 }
 
 void TabNodePool::SetMachineTag(const std::string& machine_tag) {
   machine_tag_ = machine_tag;
 }
 
-}  // namespace browser_sync
+}  // namespace sync_sessions