Quantify instability according to the stability instrumentation

components/browser_watcher/postmortem_report_collector.h

Index: components/browser_watcher/postmortem_report_collector.h
diff --git a/components/browser_watcher/postmortem_report_collector.h b/components/browser_watcher/postmortem_report_collector.h
index 08e4b9ba17d9d441cc56ab966084b55963c0fcf6..8e26ec91b1e96621371226da2f1bda5e336163fa 100644
--- a/components/browser_watcher/postmortem_report_collector.h
+++ b/components/browser_watcher/postmortem_report_collector.h
@@ -90,7 +90,8 @@ class PostmortemReportCollector {
   CollectionStatus CollectAndSubmitOneReport(
       const crashpad::UUID& client_id,
       const base::FilePath& file,
-      crashpad::CrashReportDatabase* report_database);
+      crashpad::CrashReportDatabase* report_database,

[Sigurður Ásgeirsson, 2017/05/18 12:45:03]

A single session can only contribute a single count - right? 
So maybe the contract here is better with a bool out parameter, signifying
whether THIS session was unclean.
That way the success checking logic also comes to a single point, and doesn't
need a whole lot of commenting?

[manzagop (departed), 2017/05/18 14:52:12]

Done.

+      int* unclean_system_cnt);
 
   virtual CollectionStatus CollectOneReport(
       const base::FilePath& stability_file,