[Sync] Fix namespaces for the sync_sessions component.

components/sync_sessions/tab_node_pool_unittest.cc

Index: components/sync_sessions/tab_node_pool_unittest.cc
diff --git a/components/sync_sessions/tab_node_pool_unittest.cc b/components/sync_sessions/tab_node_pool_unittest.cc
index 0b132cf1c2a20fffa49004c7ddb3679ae3e60d17..22ff16e252acd7a33db5104a461a2e8b3011e18d 100644
--- a/components/sync_sessions/tab_node_pool_unittest.cc
+++ b/components/sync_sessions/tab_node_pool_unittest.cc
@@ -13,7 +13,7 @@
 #include "components/sync/protocol/sync.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace browser_sync {
+namespace sync_sessions {
 
 class SyncTabNodePoolTest : public testing::Test {
  protected:
@@ -261,4 +261,4 @@ TEST_F(SyncTabNodePoolTest, TabPoolFreeNodeLimits) {
 
 }  // namespace
 
-}  // namespace browser_sync
+}  // namespace sync_sessions