Track when user signs in the profile.

components/signin/core/browser/signin_metrics.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/signin/core/browser/signin_metrics.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/user_metrics.h"
 
@@ skipping 33 matching lines @@
                              count_added_to_cookie_jar);
     UMA_HISTOGRAM_COUNTS_100("Signin.Reconciler.AddedToChrome.SubsequentRun",
                              count_added_to_token);
     UMA_HISTOGRAM_ENUMERATION(
         "Signin.Reconciler.DifferentPrimaryAccounts.SubsequentRun",
         ComparePrimaryAccounts(primary_accounts_same, pre_count_gaia_cookies),
         NUM_DIFFERENT_PRIMARY_ACCOUNT_METRICS);
   }
 }
 
+void LogSigninProfile(bool is_first_run, base::Time install_date) {
+  // Track whether or not the user signed in during the first run of Chrome.
+  UMA_HISTOGRAM_BOOLEAN("Signin.DuringFirstRun", is_first_run);
+
+  // Determine how much time passed since install when this profile was signed
+  // in.
+  base::TimeDelta elapsed_time = base::Time::Now() - install_date;
+  UMA_HISTOGRAM_COUNTS("Signin.ElapsedTimeFromInstallToSignin",
+                       elapsed_time.InMinutes());
+}
+
 void LogSigninAddAccount() {
   // Account signin may fail for a wide variety of reasons. There is no
   // explicit false, but one can compare this value with the various UI
   // flows that lead to account sign-in, and deduce that the difference
   // counts the failures.
   UMA_HISTOGRAM_BOOLEAN("Signin.AddAccount", true);
+

[Alexei Svitkine (slow), 2014/08/12 19:45:16]

Nit: Remove blank line.

[Mike Lerman, 2014/08/13 15:32:19]

Done.

 }
 
 void LogSignout(ProfileSignout metric) {
   UMA_HISTOGRAM_ENUMERATION("Signin.SignoutProfile", metric,
                             NUM_PROFILE_SIGNOUT_METRICS);
 }
 
 }  // namespace signin_metrics