Quantify initial stability report edge cases.

components/metrics/metrics_log.h

Index: components/metrics/metrics_log.h
diff --git a/components/metrics/metrics_log.h b/components/metrics/metrics_log.h
index 0506df28db095d2f41f1d181c905e119da933ea7..c9a9c5ba96b138c1f6391332c5c354559b2ad363 100644
--- a/components/metrics/metrics_log.h
+++ b/components/metrics/metrics_log.h
@@ -102,7 +102,7 @@ class MetricsLog {
   // Loads the environment proto that was saved by the last RecordEnvironment()
   // call from prefs and clears the pref value. Returns true on success or false
   // if there was no saved environment in prefs or it could not be decoded.
-  bool LoadSavedEnvironmentFromPrefs();
+  bool LoadSavedEnvironmentFromPrefs(std::string* app_version);
 
   // Writes application stability metrics, including stability metrics provided
   // by the specified set of |metrics_providers|. The system profile portion of