URLRequestJob: change ReadRawData contract

storage/browser/blob/blob_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_BLOB_BLOB_URL_REQUEST_JOB_H_
 #define STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 26 matching lines @@
  public:
   BlobURLRequestJob(net::URLRequest* request,
                     net::NetworkDelegate* network_delegate,
                     BlobDataHandle* blob_handle,
                     storage::FileSystemContext* file_system_context,
                     base::SingleThreadTaskRunner* resolving_thread_task_runner);
 
   // net::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 GetMimeType(std::string* mime_type) const override;
   void GetResponseInfo(net::HttpResponseInfo* info) override;
   int GetResponseCode() const override;
   void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers) override;
 
  protected:
   ~BlobURLRequestJob() override;
 
  private:
   typedef std::map<size_t, FileStreamReader*> IndexToReaderMap;
@@ skipping 17 matching lines @@
   scoped_ptr<net::HttpResponseInfo> response_info_;
 
   base::WeakPtrFactory<BlobURLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_BLOB_BLOB_URL_REQUEST_JOB_H_