Clear GCMProfileService::account_id_ when signing out

chrome/browser/services/gcm/gcm_profile_service.cc

 // Copyright (c) 2013 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/services/gcm/gcm_profile_service.h"
 
 #include <map>
 
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
@@ skipping 93 matching lines @@
     gcm_account_tracker_.reset(new GCMAccountTracker(
         gaia_account_tracker.Pass(),
         base::Bind(&GCMProfileService::IdentityObserver::AccountsUpdated,
                    weak_ptr_factory_.GetWeakPtr())));
   }
 
   gcm_account_tracker_->Start();
 }
 
 void GCMProfileService::IdentityObserver::OnActiveAccountLogout() {
+  account_id_.clear();
+
   // Check is necessary to not crash browser_tests.
   if (gcm_account_tracker_)
     gcm_account_tracker_->Stop();
   // TODO(fgorski): If we purge here, what should happen when we get
   // OnActiveAccountLogin() right after that?
   driver_->Purge();
 }
 
 std::string GCMProfileService::IdentityObserver::SignedInUserName() const {
   return driver_->IsStarted() ? account_id_ : std::string();
@@ skipping 90 matching lines @@
   return identity_observer_ ? identity_observer_->SignedInUserName()
                             : std::string();
 #endif  // defined(OS_ANDROID)
 }
 
 void GCMProfileService::SetDriverForTesting(GCMDriver* driver) {
   driver_.reset(driver);
 }
 
 }  // namespace gcm