Add Android fingerprint to metrics logs

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 8de38d7b557a11398c9527b7058ba436bbb48e1f..472dca23f0e0e2bd6c797f44e165f7c67948363a 100644
--- a/chrome/browser/metrics/metrics_log.h
+++ b/chrome/browser/metrics/metrics_log.h
@@ -179,6 +179,9 @@ class MetricsLog : public MetricsLogBase {
   void WriteProfileMetrics(const std::string& key,
                            const base::DictionaryValue& profile_metrics);
 
+  // Within the profile group, write the OS information.
+  void WriteOSInfoElement();
+
   // Writes info about the Google Update install that is managing this client.
   // This is a no-op if called on a non-Windows platform.
   void WriteGoogleUpdateProto(const GoogleUpdateMetrics& google_update_metrics);