Shift passage of FileStream in downloads system to be by scoped_ptr<>.

content/browser/download/base_file.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_BASE_FILE_H_
 #define CONTENT_BROWSER_DOWNLOAD_BASE_FILE_H_
 
 #include <string>
 
 #include "base/file_path.h"
@@ skipping 17 matching lines @@
 // File being downloaded and saved to disk. This is a base class
 // for DownloadFile and SaveFile, which keep more state information.
 class CONTENT_EXPORT BaseFile {
  public:
   BaseFile(const FilePath& full_path,
            const GURL& source_url,
            const GURL& referrer_url,
            int64 received_bytes,
            bool calculate_hash,
            const std::string& hash_state,
-           const linked_ptr<net::FileStream>& file_stream,
+           scoped_ptr<net::FileStream> file_stream,
            const net::BoundNetLog& bound_net_log);
   virtual ~BaseFile();
 
   // Returns net::OK on success, or a network error code on failure.
   // |default_directory| specifies the directory to create the temporary file in
   // if |full_path()| is empty. If |default_directory| and |full_path()| are
   // empty, then a temporary file will be created in the default download
   // location as determined by ContentBrowserClient.
   net::Error Initialize(const FilePath& default_directory);
 
@@ skipping 15 matching lines @@
   // Indicate that the download has finished. No new data will be received.
   void Finish();
 
   // Informs the OS that this file came from the internet.
   void AnnotateWithSourceInformation();
 
   // Calculate and return the current speed in bytes per second.
   int64 CurrentSpeed() const;
 
   FilePath full_path() const { return full_path_; }
-  bool in_progress() const { return file_stream_ != NULL; }
+  bool in_progress() const { return file_stream_.get() != NULL; }
   int64 bytes_so_far() const { return bytes_so_far_; }
 
   // Fills |hash| with the hash digest for the file.
   // Returns true if digest is successfully calculated.
   virtual bool GetHash(std::string* hash);
 
   // Returns the current (intermediate) state of the hash as a byte string.
   virtual std::string GetHashState();
 
   // Returns true if the given hash is considered empty.  An empty hash is
@@ skipping 27 matching lines @@
   static const size_t kSha256HashLen = 32;
   static const unsigned char kEmptySha256Hash[kSha256HashLen];
 
   // Source URL for the file being downloaded.
   GURL source_url_;
 
   // The URL where the download was initiated.
   GURL referrer_url_;
 
   // OS file stream for writing
-  linked_ptr<net::FileStream> file_stream_;
+  scoped_ptr<net::FileStream> file_stream_;
 
   // Amount of data received up so far, in bytes.
   int64 bytes_so_far_;
 
   // Start time for calculating speed.
   base::TimeTicks start_tick_;
 
   // Indicates if hash should be calculated for the file.
   bool calculate_hash_;
 
   // Used to calculate hash for the file when calculate_hash_
   // is set.
   scoped_ptr<crypto::SecureHash> secure_hash_;
 
   unsigned char sha256_hash_[kSha256HashLen];
 
   // Indicates that this class no longer owns the associated file, and so
   // won't delete it on destruction.
   bool detached_;
 
   net::BoundNetLog bound_net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseFile);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_BASE_FILE_H_