TaskScheduler: migrate appcache database over to use it.

content/browser/appcache/chrome_appcache_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 "content/browser/appcache/chrome_appcache_service.h"
 
 #include "base/files/file_path.h"
 #include "base/profiler/scoped_tracker.h"
 #include "content/browser/appcache/appcache_storage_impl.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 26 matching lines @@
 
   // The |request_context_getter| can be NULL in some unit tests.
   //
   // TODO(ajwong): TestProfile is difficult to work with. The
   // SafeBrowsing tests require that GetRequestContext return NULL
   // so we can't depend on having a non-NULL value here. See crbug/149783.
   if (request_context_getter)
     set_request_context(request_context_getter->GetURLRequestContext());
 
   // Init our base class.
-  Initialize(cache_path_, BrowserThread::GetTaskRunnerForThread(
-                              BrowserThread::FILE_USER_BLOCKING)
-                              .get(),
+  Initialize(cache_path_,
              BrowserThread::GetTaskRunnerForThread(BrowserThread::CACHE).get());
   set_appcache_policy(this);
   set_special_storage_policy(special_storage_policy.get());
 }
 
 bool ChromeAppCacheService::CanLoadAppCache(const GURL& manifest_url,
                                             const GURL& first_party) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   // We don't prompt for read access.
   return GetContentClient()->browser()->AllowAppCache(
@@ skipping 15 matching lines @@
     return;
   }
   if (BrowserThread::IsMessageLoopValid(BrowserThread::IO)) {
     BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
     return;
   }
   // Better to leak than crash on shutdown.
 }
 
 }  // namespace content