Record keep alive registry's state in stability instrumentation

components/browser_watcher/stability_data_names.cc

Index: components/browser_watcher/stability_data_names.cc
diff --git a/components/browser_watcher/stability_data_names.cc b/components/browser_watcher/stability_data_names.cc
index 63341220516de63b7e77129e52e166109e037149..98efb8cfa0138fa78fee4e83f344c9fd0713c67d 100644
--- a/components/browser_watcher/stability_data_names.cc
+++ b/components/browser_watcher/stability_data_names.cc
@@ -8,12 +8,14 @@ namespace browser_watcher {
 
 const char kStabilityChannel[] = "channel";
 const char kStabilityExecutionPhase[] = "stability-execution-phase";
+const char kStabilityKeepAlive[] = "keep-alive";
 const char kStabilityPlatform[] = "platform";
 const char kStabilityProduct[] = "product";
 const char kStabilityReporterChannel[] = "reporter-channel";
 const char kStabilityReporterPlatform[] = "reporter-platform";
 const char kStabilityReporterProduct[] = "reporter-product";
 const char kStabilityReporterVersion[] = "reporter-version";
+const char kStabilityRestartAllowed[] = "restart-allowed";
 const char kStabilitySpecialBuild[] = "special-build";
 const char kStabilityStartTimestamp[] = "start-timestamp";
 const char kStabilityVersion[] = "version";