arc: Skip GMS Sign-In in case Android is already signed-in.

chrome/browser/chromeos/arc/arc_optin_uma.cc

Index: chrome/browser/chromeos/arc/arc_optin_uma.cc
diff --git a/chrome/browser/chromeos/arc/arc_optin_uma.cc b/chrome/browser/chromeos/arc/arc_optin_uma.cc
index b52991a391af47a11c5d99cc826273855cf612c3..9e35c036681b71b19ce4791a2c7187f6abe64d2c 100644
--- a/chrome/browser/chromeos/arc/arc_optin_uma.cc
+++ b/chrome/browser/chromeos/arc/arc_optin_uma.cc
@@ -64,6 +64,12 @@ void UpdateAuthCheckinAttempts(int32_t num_attempts) {
   UMA_HISTOGRAM_SPARSE_SLOWLY("ArcAuth.CheckinAttempts", num_attempts);
 }
 
+void UpdateAuthAccountCheckStatus(AccountCheckStatus status) {
+  UMA_HISTOGRAM_ENUMERATION("ArcAuth.AccountCheckStatus",
+                            static_cast<int>(status),
+                            static_cast<int>(AccountCheckStatus::SIZE));

[dcheng, 2017/03/25 00:55:04]

Hmm... this doesn't work without the static cast?

(Guess not, filed https://crbug.com/705171 for fixing this)

[khmel, 2017/03/25 01:24:14]

Thank for caring this case! I confirmed that this does not compile.

+}
+
 void UpdateSilentAuthCodeUMA(OptInSilentAuthCode state) {
   UMA_HISTOGRAM_ENUMERATION("Arc.OptInSilentAuthCode", static_cast<int>(state),
                             static_cast<int>(OptInSilentAuthCode::SIZE));