storage: Cleanup class/struct forward declarations

storage/browser/fileapi/file_system_url_request_job.h

 // 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.
 
 #ifndef STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_URL_REQUEST_JOB_H_
 #define STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_URL_REQUEST_JOB_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_byte_range.h"
 #include "net/url_request/url_request_job.h"
 #include "storage/browser/fileapi/file_system_url.h"
 #include "storage/browser/storage_browser_export.h"
 
 class GURL;
 
-namespace base {
-class FilePath;
-}
-
 namespace storage {
 class FileStreamReader;
 }
 
 namespace storage {
 class FileSystemContext;
 
 // A request job that handles reading filesystem: URLs
 class STORAGE_EXPORT FileSystemURLRequestJob : public net::URLRequestJob {
  public:
@@ skipping 36 matching lines @@
   net::Error range_parse_result_;
   net::HttpByteRange byte_range_;
   base::WeakPtrFactory<FileSystemURLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemURLRequestJob);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_URL_REQUEST_JOB_H_