Add multi_profile_user_count field to system_profile proto.

chrome/browser/metrics/metrics_log.h

Index: chrome/browser/metrics/metrics_log.h
diff --git a/chrome/browser/metrics/metrics_log.h b/chrome/browser/metrics/metrics_log.h
index fe06b61f03caf343887f796cef4c3929256e6ef5..34b1cc92efb9b97e7a6a540c6ded1ca9ed3c222b 100644
--- a/chrome/browser/metrics/metrics_log.h
+++ b/chrome/browser/metrics/metrics_log.h
@@ -189,6 +189,10 @@ class MetricsLog : public MetricsLogBase {
 
 #if defined(OS_CHROMEOS)
   metrics::PerfProvider perf_provider_;
+
+  // The number of users in the multiprofile session
+  // when the log is first opened.

[Ilya Sherman, 2013/09/30 23:42:52]

nit: Please wrap this to 80-col.

+  int initial_multi_profile_user_count_;

[Ilya Sherman, 2013/09/30 23:42:52]

nit: const?

[Ilya Sherman, 2013/09/30 23:42:52]

Why not store this directly in the protocol buffer, and then reset it if need
be?

[Tim Song, 2013/10/05 01:25:23]

This would probably be cleaner. I'll remove this member variable.

 #endif
 
   // Bluetooth Adapter instance for collecting information about paired devices.