Make sure GetAuthenticatedAccountId() returns a canonicalized id.

chrome/browser/services/gcm/fake_signin_manager.cc

Index: chrome/browser/services/gcm/fake_signin_manager.cc
diff --git a/chrome/browser/services/gcm/fake_signin_manager.cc b/chrome/browser/services/gcm/fake_signin_manager.cc
index dea05cecf2d864e843cc021a17b2f013a267f2b1..049b4150698c1840a55c960f00bcce1a7e8413c5 100644
--- a/chrome/browser/services/gcm/fake_signin_manager.cc
+++ b/chrome/browser/services/gcm/fake_signin_manager.cc
@@ -45,7 +45,7 @@ void FakeSigninManager::SignOut(
     signin_metrics::ProfileSignout signout_source_metric) {
   const std::string account_id = GetAuthenticatedAccountId();
   const std::string username = GetAuthenticatedUsername();
-  clear_authenticated_username();
+  ClearAuthenticatedUsername();
   profile_->GetPrefs()->ClearPref(prefs::kGoogleServicesUsername);
   FOR_EACH_OBSERVER(Observer,
                     observer_list_,