AppCache: Use a dedicated thread for the disk cache.

webkit/appcache/appcache_service.cc

 // Copyright (c) 2009 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 "webkit/appcache/appcache_service.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/stl_util-inl.h"
 #include "webkit/appcache/appcache_backend_impl.h"
@@ skipping 125 matching lines @@
 
 AppCacheService::~AppCacheService() {
   DCHECK(backends_.empty());
 
   std::for_each(pending_helpers_.begin(),
                 pending_helpers_.end(),
                 std::mem_fun(&AsyncHelper::Cancel));
   STLDeleteElements(&pending_helpers_);
 }
 
-void AppCacheService::Initialize(const FilePath& cache_directory) {
+void AppCacheService::Initialize(const FilePath& cache_directory,
+                                 base::MessageLoopProxy* cache_thread) {
   DCHECK(!storage_.get());
   AppCacheStorageImpl* storage = new AppCacheStorageImpl(this);
-  storage->Initialize(cache_directory);
+  storage->Initialize(cache_directory, cache_thread);
   storage_.reset(storage);
 }
 
 void AppCacheService::GetAllAppCacheInfo(AppCacheInfoCollection* collection,
                                          net::CompletionCallback* callback) {
   DCHECK(collection);
   GetInfoHelper* helper = new GetInfoHelper(this, collection, callback);
   helper->Start();
 }
 
 void AppCacheService::DeleteAppCacheGroup(const GURL& manifest_url,
                                           net::CompletionCallback* callback) {
   DeleteHelper* helper = new DeleteHelper(this, manifest_url, callback);
   helper->Start();
 }
 
 void AppCacheService::RegisterBackend(
     AppCacheBackendImpl* backend_impl) {
   DCHECK(backends_.find(backend_impl->process_id()) == backends_.end());
   backends_.insert(
       BackendMap::value_type(backend_impl->process_id(), backend_impl));
 }
 
 void AppCacheService::UnregisterBackend(
     AppCacheBackendImpl* backend_impl) {
   backends_.erase(backend_impl->process_id());
 }
 
 }  // namespace appcache