Remove unused include in sequenced_worker_pool.h

storage/browser/blob/blob_async_builder_host.h

 // Copyright 2015 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.
 
 #ifndef STORAGE_BROWSER_BLOB_BLOB_ASYNC_BUILDER_HOST_H_
 #define STORAGE_BROWSER_BLOB_BLOB_ASYNC_BUILDER_HOST_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory_handle.h"
 #include "base/memory/weak_ptr.h"
 #include "storage/browser/blob/blob_async_transport_request_builder.h"
 #include "storage/browser/blob/blob_data_builder.h"
 #include "storage/browser/blob/blob_transport_result.h"
 #include "storage/browser/storage_browser_export.h"
 #include "storage/common/blob_storage/blob_item_bytes_request.h"
 #include "storage/common/blob_storage/blob_item_bytes_response.h"
 #include "storage/common/blob_storage/blob_storage_constants.h"
 #include "storage/common/data_element.h"
@@ skipping 166 matching lines @@
   size_t max_shared_memory_size_ = kBlobStorageMaxSharedMemoryBytes;
   uint64_t max_file_size_ = kBlobStorageMaxFileSizeBytes;
 
   base::WeakPtrFactory<BlobAsyncBuilderHost> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobAsyncBuilderHost);
 };
 
 }  // namespace storage
 #endif  // STORAGE_BROWSER_BLOB_BLOB_ASYNC_BUILDER_HOST_H_