Added check for valid account cookies in /ListAccounts result processing.

chrome/browser/chromeos/login/signin/oauth2_login_manager.cc

Index: chrome/browser/chromeos/login/signin/oauth2_login_manager.cc
diff --git a/chrome/browser/chromeos/login/signin/oauth2_login_manager.cc b/chrome/browser/chromeos/login/signin/oauth2_login_manager.cc
index 122d679758b97cc71203204b6fc44158324d7d01..97bff3b6c1bc5e2afa4e845c0d876d97b917aa93 100644
--- a/chrome/browser/chromeos/login/signin/oauth2_login_manager.cc
+++ b/chrome/browser/chromeos/login/signin/oauth2_login_manager.cc
@@ -312,7 +312,7 @@ void OAuth2LoginManager::OnListAccountsSuccess(const std::string& data) {
              accounts.begin();
          iter != accounts.end(); ++iter) {
       if (gaia::CanonicalizeEmail(iter->first) == user_email) {
-        found = true;
+        found = iter->second;
         break;
       }