[Downloads] Introduce GUIDs for downloads.

content/browser/download/download_item_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_ITEM_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 34 matching lines @@
   // The maximum number of attempts we will make to resume automatically.
   static const int kMaxAutoResumeAttempts;
 
   // Note that it is the responsibility of the caller to ensure that a
   // DownloadItemImplDelegate passed to a DownloadItemImpl constructor
   // outlives the DownloadItemImpl.
 
   // Constructing from persistent store:
   // |bound_net_log| is constructed externally for our use.
   DownloadItemImpl(DownloadItemImplDelegate* delegate,
+                   const std::string& guid,
                    uint32_t id,
                    const base::FilePath& current_path,
                    const base::FilePath& target_path,
                    const std::vector<GURL>& url_chain,
                    const GURL& referrer_url,
                    const std::string& mime_type,
                    const std::string& original_mime_type,
                    const base::Time& start_time,
                    const base::Time& end_time,
                    const std::string& etag,
@@ skipping 33 matching lines @@
   void UpdateObservers() override;
   void ValidateDangerousDownload() override;
   void StealDangerousDownload(const AcquireFileCallback& callback) override;
   void Pause() override;
   void Resume() override;
   void Cancel(bool user_cancel) override;
   void Remove() override;
   void OpenDownload() override;
   void ShowDownloadInShell() override;
   uint32_t GetId() const override;
+  const std::string& GetGuid() const override;
   DownloadState GetState() const override;
   DownloadInterruptReason GetLastReason() const override;
   bool IsPaused() const override;
   bool IsTemporary() const override;
   bool CanResume() const override;
   bool IsDone() const override;
   const GURL& GetURL() const override;
   const std::vector<GURL>& GetUrlChain() const override;
   const GURL& GetOriginalUrl() const override;
   const GURL& GetReferrerUrl() const override;
@@ skipping 355 matching lines @@
                                      DownloadInternalState to);
 
   // Will be false for save package downloads retrieved from the history.
   // TODO(rdsmith): Replace with a generalized enum for "download source".
   const bool is_save_package_download_ = false;
 
   // The handle to the request information.  Used for operations outside the
   // download system.
   scoped_ptr<DownloadRequestHandleInterface> request_handle_;
 
+  std::string guid_;
+
   uint32_t download_id_ = kInvalidId;
 
   // Display name for the download. If this is empty, then the display name is
   // considered to be |target_path_.BaseName()|.
   base::FilePath display_name_;
 
   // Full path to the downloaded or downloading file. This is the path to the
   // physical file, if one exists. The final target path is specified by
   // |target_path_|. |current_path_| can be empty if the in-progress path hasn't
   // been determined.
@@ skipping 145 matching lines @@
   const net::BoundNetLog bound_net_log_;
 
   base::WeakPtrFactory<DownloadItemImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_