Clear session-only data when all browser windows are closed.

chrome/browser/sessions/session_service_factory.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/sessions/session_service_factory.h"
 
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/sessions/session_data_deleter.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
 
 // static
 SessionService* SessionServiceFactory::GetForProfile(Profile* profile) {
 #if defined(OS_ANDROID)
   // For Android we do not store sessions in the SessionService.
   return NULL;
 #else
   return static_cast<SessionService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 #endif
 }
 
 // static
 SessionService* SessionServiceFactory::GetForProfileIfExisting(
     Profile* profile) {
 #if defined(OS_ANDROID)
   // For Android we do not store sessions in the SessionService.
   return NULL;
 #else
   return static_cast<SessionService*>(
       GetInstance()->GetServiceForBrowserContext(profile, false));
 #endif
 }
 
 // static
 void SessionServiceFactory::ShutdownForProfile(Profile* profile) {
+  DeleteSessionOnlyData(profile);
+
   // We're about to exit, force creation of the session service if it hasn't
   // been created yet. We do this to ensure session state matches the point in
   // time the user exited.
   SessionServiceFactory* factory = GetInstance();
   factory->GetServiceForBrowserContext(profile, true);
 
   // Shut down and remove the reference to the session service, and replace it
   // with an explicit NULL to prevent it being recreated on the next access.
   factory->BrowserContextShutdown(profile);
   factory->BrowserContextDestroyed(profile);
@@ skipping 21 matching lines @@
   return service;
 }
 
 bool SessionServiceFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 bool SessionServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }