Automated IWYU fix for TaskRunner includes.

content/browser/cache_storage/cache_storage_manager.cc

 // Copyright 2014 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/cache_storage/cache_storage_manager.h"
 
 #include <stdint.h>
 
 #include <map>
 #include <set>
 #include <utility>
 
 #include "base/barrier_closure.h"
 #include "base/bind.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
 #include "base/id_map.h"
 #include "base/memory/ptr_util.h"
+#include "base/sequenced_task_runner.h"
 #include "base/sha1.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "content/browser/cache_storage/cache_storage.h"
 #include "content/browser/cache_storage/cache_storage.pb.h"
 #include "content/browser/cache_storage/cache_storage_quota_client.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
@@ skipping 415 matching lines @@
     const base::FilePath& root_path,
     const GURL& origin) {
   const std::string identifier = storage::GetIdentifierFromOrigin(origin);
   const std::string origin_hash = base::SHA1HashString(identifier);
   const std::string origin_hash_hex = base::ToLowerASCII(
       base::HexEncode(origin_hash.c_str(), origin_hash.length()));
   return root_path.AppendASCII(origin_hash_hex);
 }
 
 }  // namespace content