Make sure GetAuthenticatedAccountId() returns a canonicalized id.

chrome/browser/sync/profile_sync_service.cc

Index: chrome/browser/sync/profile_sync_service.cc
diff --git a/chrome/browser/sync/profile_sync_service.cc b/chrome/browser/sync/profile_sync_service.cc
index 3acb432b78ff0bd4e2cc1a427717519bae521a6d..20f7f96f112fdd5062e50035880140732fd0cc26 100644
--- a/chrome/browser/sync/profile_sync_service.cc
+++ b/chrome/browser/sync/profile_sync_service.cc
@@ -282,8 +282,9 @@ bool ProfileSyncService::IsOAuthRefreshTokenAvailable() {
   if (!oauth2_token_service_)
     return false;
 
-  return oauth2_token_service_->RefreshTokenIsAvailable(
-      signin_->GetAccountIdToUse());
+  std::string account_id = signin_->GetAccountIdToUse();
+  return !account_id.empty() &&
+      oauth2_token_service_->RefreshTokenIsAvailable(account_id);
 }
 
 void ProfileSyncService::Initialize() {