AppCaches which belong to hosted apps are not protected from deletion

content/browser/appcache/chrome_appcache_service.cc

 // Copyright (c) 2011 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 "content/browser/appcache/chrome_appcache_service.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "content/browser/content_browser_client.h"
 #include "content/common/notification_service.h"
 #include "net/base/net_errors.h"
 #include "webkit/appcache/appcache_thread.h"
 #include "webkit/quota/quota_manager.h"
 
 static bool has_initialized_thread_ids;
 
-namespace {
-
-// Used to defer deleting of local storage until the destructor has finished.
-void DeleteLocalStateOnIOThread(FilePath cache_path) {
-  // Post the actual deletion to the DB thread to ensure it happens after the
-  // database file has been closed.
-  BrowserThread::PostTask(
-      BrowserThread::DB, FROM_HERE,
-      NewRunnableFunction<bool(*)(const FilePath&, bool), FilePath, bool>(
-          &file_util::Delete, cache_path, true));
-}
-
-}  // namespace
-
 // ----------------------------------------------------------------------------
 
 ChromeAppCacheService::ChromeAppCacheService(
     quota::QuotaManagerProxy* quota_manager_proxy)
     : AppCacheService(quota_manager_proxy),
-      resource_context_(NULL), clear_local_state_on_exit_(false) {
+      resource_context_(NULL) {
 }
 
 void ChromeAppCacheService::InitializeOnIOThread(
     const FilePath& cache_path,
     const content::ResourceContext* resource_context,
-    scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy,
-    bool clear_local_state_on_exit) {
+    scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   if (!has_initialized_thread_ids) {
     has_initialized_thread_ids = true;
     appcache::AppCacheThread::Init(BrowserThread::DB, BrowserThread::IO);
   }
 
   cache_path_ = cache_path;
   resource_context_ = resource_context;
   registrar_.Add(
       this, content::NOTIFICATION_PURGE_MEMORY,
       NotificationService::AllSources());
-  SetClearLocalStateOnExit(clear_local_state_on_exit);
 
   // Init our base class.
   Initialize(cache_path_,
              BrowserThread::GetMessageLoopProxyForThread(BrowserThread::CACHE));
   set_appcache_policy(this);
   set_special_storage_policy(special_storage_policy);
 }
 
 ChromeAppCacheService::~ChromeAppCacheService() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-
-  if (clear_local_state_on_exit_ && !cache_path_.empty()) {
-    BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE,
-        NewRunnableFunction(DeleteLocalStateOnIOThread, cache_path_));
-  }
-}
-
-void ChromeAppCacheService::SetClearLocalStateOnExit(bool clear_local_state) {
-  // TODO(michaeln): How is 'protected' status granted to apps in this case?
-  if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
-    BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE,
-        NewRunnableMethod(this,
-                          &ChromeAppCacheService::SetClearLocalStateOnExit,
-                          clear_local_state));
-    return;
-  }
-  clear_local_state_on_exit_ = clear_local_state;
 }
 
 bool ChromeAppCacheService::CanLoadAppCache(const GURL& manifest_url) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   // We don't prompt for read access.
   return content::GetContentClient()->browser()->AllowAppCache(
       manifest_url, *resource_context_);
 }
 
 int ChromeAppCacheService::CanCreateAppCache(
@@ skipping 28 matching lines @@
     const tracked_objects::Location& from_here,
     Task* task) {
   return BrowserThread::PostTask(ToBrowserThreadID(id), from_here, task);
 }
 
 bool AppCacheThread::CurrentlyOn(int id) {
   return BrowserThread::CurrentlyOn(ToBrowserThreadID(id));
 }
 
 }  // namespace appcache