Let IndexedDBContextImpl create its own task runner

content/browser/indexed_db/indexed_db_context_impl.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/indexed_db/indexed_db_context_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/task_scheduler/post_task.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/indexed_db/indexed_db_connection.h"
 #include "content/browser/indexed_db/indexed_db_database.h"
 #include "content/browser/indexed_db/indexed_db_dispatcher_host.h"
 #include "content/browser/indexed_db/indexed_db_factory_impl.h"
 #include "content/browser/indexed_db/indexed_db_quota_client.h"
@@ skipping 72 matching lines @@
       continue;
     base::DeleteFile(*file_path, true);
   }
 }
 
 }  // namespace
 
 IndexedDBContextImpl::IndexedDBContextImpl(
     const base::FilePath& data_path,
     storage::SpecialStoragePolicy* special_storage_policy,
-    storage::QuotaManagerProxy* quota_manager_proxy,
-    scoped_refptr<base::SequencedTaskRunner> task_runner)
+    storage::QuotaManagerProxy* quota_manager_proxy)
     : force_keep_session_state_(false),
       special_storage_policy_(special_storage_policy),
       quota_manager_proxy_(quota_manager_proxy),
-      task_runner_(std::move(task_runner)) {
+      task_runner_(base::CreateSequencedTaskRunnerWithTraits(
+          {base::MayBlock(), base::WithBaseSyncPrimitives(),
+           base::TaskPriority::USER_VISIBLE,
+           base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN})) {
   IDB_TRACE("init");
   if (!data_path.empty())
     data_path_ = data_path.Append(kIndexedDBDirectory);
   quota_manager_proxy->RegisterClient(new IndexedDBQuotaClient(this));
 }
 
 IndexedDBFactory* IndexedDBContextImpl::GetIDBFactory() {
   DCHECK(TaskRunner()->RunsTasksInCurrentSequence());
   if (!factory_.get()) {
     // Prime our cache of origins with existing databases so we can
@@ skipping 291 matching lines @@
     const GURL& origin_url) const {
   return GetFilePathForTesting(Origin(origin_url));
 }
 
 base::FilePath IndexedDBContextImpl::GetFilePathForTesting(
     const Origin& origin) const {
   return GetLevelDBPath(origin);
 }
 
 void IndexedDBContextImpl::SetTaskRunnerForTesting(
-    base::SequencedTaskRunner* task_runner) {
-  DCHECK(!task_runner_.get());
+    const scoped_refptr<base::SequencedTaskRunner>& task_runner) {
   task_runner_ = task_runner;
 }
 
 void IndexedDBContextImpl::ConnectionOpened(const Origin& origin,
                                             IndexedDBConnection* connection) {
   DCHECK(TaskRunner()->RunsTasksInCurrentSequence());
   quota_manager_proxy()->NotifyStorageAccessed(
       storage::QuotaClient::kIndexedDatabase, origin.GetURL(),
       storage::kStorageTypeTemporary);
   if (AddToOriginSet(origin)) {
@@ skipping 122 matching lines @@
 void IndexedDBContextImpl::ResetCaches() {
   origin_set_.reset();
   origin_size_map_.clear();
 }
 
 base::SequencedTaskRunner* IndexedDBContextImpl::TaskRunner() const {
   return task_runner_.get();
 }
 
 }  // namespace content