Add stability_debugging_win_unittest.cc to build config

components/browser_watcher/BUILD.gn

Index: components/browser_watcher/BUILD.gn
diff --git a/components/browser_watcher/BUILD.gn b/components/browser_watcher/BUILD.gn
index ff857fe05ce5ebe0dab683f170d2cc31dffd8712..ecb1d99567631d7b0e1b6aee0ad13c0c920dce4c 100644
--- a/components/browser_watcher/BUILD.gn
+++ b/components/browser_watcher/BUILD.gn
@@ -95,6 +95,7 @@ if (is_win) {
       "exit_code_watcher_win_unittest.cc",
       "postmortem_minidump_writer_win_unittest.cc",
       "postmortem_report_collector_unittest.cc",
+      "stability_debugging_win_unittest.cc",
       "system_session_analyzer_win_unittest.cc",
       "watcher_client_win_unittest.cc",
       "watcher_metrics_provider_win_unittest.cc",
@@ -105,6 +106,7 @@ if (is_win) {
       ":browser_watcher",
       ":browser_watcher_client",
       ":postmortem_report_collector",
+      ":stability",
       ":stability_data",
       ":stability_report_proto",
       "//base",