Make sure GetAuthenticatedAccountId() returns a canonicalized id.

chrome/browser/sync/profile_sync_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/profile_sync_service.h"
 
 #include <cstddef>
 #include <map>
 #include <vector>
 
@@ skipping 264 matching lines @@
     return false;
 
   // Sync is logged in if there is a non-empty effective username.
   return !signin_->GetEffectiveUsername().empty();
 }
 
 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() {
   // We clear this here (vs Shutdown) because we want to remember that an error
   // happened on shutdown so we can display details (message, location) about it
   // in about:sync.
   ClearStaleErrors();
 
   sync_prefs_.AddSyncPrefObserver(this);
 
@@ skipping 2410 matching lines @@
 base::Time ProfileSyncService::GetDeviceBackupTimeForTesting() const {
   return device_info_sync_service_->GetLocalDeviceBackupTime();
 }
 
 void ProfileSyncService::FlushDirectory() const {
   // backend_initialized_ implies backend_ isn't NULL and the manager exists.
   // If sync is not initialized yet, we fail silently.
   if (backend_initialized_)
     backend_->FlushDirectory();
 }