[Sync] Fix namespaces for the browser_sync component.

components/browser_sync/test_profile_sync_service.h

Index: components/browser_sync/test_profile_sync_service.h
diff --git a/components/browser_sync/test_profile_sync_service.h b/components/browser_sync/test_profile_sync_service.h
index 7131a15563afdd27f4a39567c7e89857a3882328..5e6b296bd82e9ea860f397c4dcacee06ff76150c 100644
--- a/components/browser_sync/test_profile_sync_service.h
+++ b/components/browser_sync/test_profile_sync_service.h
@@ -16,6 +16,8 @@ namespace sync_driver {
 class SyncPrefs;
 }  // namespace sync_driver
 
+namespace browser_sync {
+
 class TestProfileSyncService : public ProfileSyncService {
  public:
   explicit TestProfileSyncService(InitParams init_params);
@@ -47,4 +49,6 @@ class TestProfileSyncService : public ProfileSyncService {
   DISALLOW_COPY_AND_ASSIGN(TestProfileSyncService);
 };
 
+}  // namespace browser_sync
+
 #endif  // COMPONENTS_BROWSER_SYNC_TEST_PROFILE_SYNC_SERVICE_H_