Reland: URLRequestJob: change ReadRawData contract

storage/browser/fileapi/file_system_dir_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_DIR_URL_REQUEST_JOB_H_
 #define STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_DIR_URL_REQUEST_JOB_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 14 matching lines @@
  public:
   FileSystemDirURLRequestJob(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate,
       const std::string& storage_domain,
       FileSystemContext* file_system_context);
 
   // URLRequestJob methods:
   void Start() override;
   void Kill() override;
-  bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override;
+  int ReadRawData(net::IOBuffer* buf, int buf_size) override;
   bool GetCharset(std::string* charset) override;
 
   // FilterContext methods (via URLRequestJob):
   bool GetMimeType(std::string* mime_type) const override;
   // TODO(adamk): Implement GetResponseInfo and GetResponseCode to simulate
   // an HTTP response.
 
  private:
   class CallbackDispatcher;
 
@@ skipping 18 matching lines @@
   const std::string storage_domain_;
   FileSystemContext* file_system_context_;
   base::WeakPtrFactory<FileSystemDirURLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemDirURLRequestJob);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_DIR_URL_REQUEST_JOB_H_