Add an experiment to redirect DOMStorageTaskRunner to TaskScheduler.

content/browser/dom_storage/dom_storage_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/dom_storage/dom_storage_context_impl.h"
 
 #include <inttypes.h>
 #include <stddef.h>
 #include <stdlib.h>
 
+#include <utility>
+
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/guid.h"
 #include "base/location.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
@@ skipping 46 matching lines @@
   }
   return total_stats;
 }
 
 }  // namespace
 
 DOMStorageContextImpl::DOMStorageContextImpl(
     const base::FilePath& localstorage_directory,
     const base::FilePath& sessionstorage_directory,
     storage::SpecialStoragePolicy* special_storage_policy,
-    DOMStorageTaskRunner* task_runner)
+    scoped_refptr<DOMStorageTaskRunner> task_runner)
     : localstorage_directory_(localstorage_directory),
       sessionstorage_directory_(sessionstorage_directory),
-      task_runner_(task_runner),
-      session_id_offset_(
-          abs((g_session_id_offset_sequence++ % 10)) * kSessionIdOffsetAmount),
+      task_runner_(std::move(task_runner)),
+      session_id_offset_(abs((g_session_id_offset_sequence++ % 10)) *
+                         kSessionIdOffsetAmount),
       session_id_sequence_(session_id_offset_),
       is_shutdown_(false),
       force_keep_session_state_(false),
       special_storage_policy_(special_storage_policy),
       scavenging_started_(false),
       is_low_end_device_(base::SysInfo::IsLowEndDevice()) {
   // Tests may run without task runners.
   if (task_runner_) {
     // Registering dump provider is safe even outside the task runner.
     base::trace_event::MemoryDumpManager::GetInstance()
@@ skipping 536 matching lines @@
   if (!deletable_persistent_namespace_ids_.empty()) {
     task_runner_->PostDelayedTask(
         FROM_HERE, base::Bind(
             &DOMStorageContextImpl::DeleteNextUnusedNamespace,
             this),
         base::TimeDelta::FromSeconds(kSessionStoraceScavengingSeconds));
   }
 }
 
 }  // namespace content