Track when user signs in the profile.

components/signin/core/browser/signin_metrics.h

Index: components/signin/core/browser/signin_metrics.h
diff --git a/components/signin/core/browser/signin_metrics.h b/components/signin/core/browser/signin_metrics.h
index 20e27a699b6d02e1078b2ea1360e55f272db0319..3d8832e58b79b4bbce9d7a46ad84e052f8077b25 100644
--- a/components/signin/core/browser/signin_metrics.h
+++ b/components/signin/core/browser/signin_metrics.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_METRICS_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_METRICS_H_
 
+#include "base/time/time.h"
+
 namespace signin_metrics {
 
 // Enum for the ways in which primary account detection is done.
@@ -70,6 +72,9 @@ void LogSigninAccountReconciliation(int total_number_accounts,
 // Track a successful signin.
 void LogSigninAddAccount();
 
+// Track a successful signin of a profile.
+void LogSigninProfile(bool is_first_run, base::Time install_date);
+
 // Track a profile signout.
 void LogSignout(ProfileSignout metric);