Verify that all slice are downloaded when a stream complete

content/browser/download/download_file_impl.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 CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_
 
 #include "content/browser/download/download_file.h"
 
 #include <stddef.h>
@@ skipping 165 matching lines @@
   // Called before the data is written to disk.
   void WillWriteToDisk(size_t data_len);
 
   // Called when there's some activity on the byte stream that needs to be
   // handled.
   void StreamActive(SourceStream* source_stream);
 
   // Register callback and start to read data from the stream.
   void RegisterAndActivateStream(SourceStream* source_stream);
 
+  // Check if download is completed.
+  bool IsDownloadCompleted();
+
   // Return the total valid bytes received in the target file.
   // If the file is a sparse file, return the total number of valid bytes.
   // Otherwise, return the current file size.
   int64_t TotalBytesReceived() const;
 
   net::NetLogWithSource net_log_;
 
   // The base file instance.
   BaseFile file_;
 
@@ skipping 32 matching lines @@
 
   base::WeakPtr<DownloadDestinationObserver> observer_;
   base::WeakPtrFactory<DownloadFileImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_IMPL_H_