Remove DownloadFileManager in favor of direct ownership of DownloadFiles.

content/browser/download/download_manager_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_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 
 #include <map>
 #include <set>
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/synchronization/lock.h"
-#include "content/browser/download/download_item_factory.h"
 #include "content/browser/download/download_item_impl_delegate.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/download_manager.h"
 
 class DownloadFileManager;
 class DownloadItemImpl;
 
+namespace content {
+class DownloadItemFactory;
+class DownloadFileFactory;
+}
+
+namespace net {
+class BoundNetLog;
+}
+
 class CONTENT_EXPORT DownloadManagerImpl
     : public content::DownloadManager,
       private DownloadItemImplDelegate {
  public:
-  // Caller guarantees that |file_manager| and |net_log| will remain valid
+  // Caller guarantees that |net_log| will remain valid
   // for the lifetime of DownloadManagerImpl (until Shutdown() is called).
   // |factory| may be a default constructed (null) scoped_ptr; if so,
   // the DownloadManagerImpl creates and takes ownership of the
   // default DownloadItemFactory.
-  DownloadManagerImpl(DownloadFileManager* file_manager,
-                      scoped_ptr<content::DownloadItemFactory> factory,
+  DownloadManagerImpl(scoped_ptr<content::DownloadItemFactory> item_factory,
+                      scoped_ptr<content::DownloadFileFactory> file_factory,
                       net::NetLog* net_log);
 
   // Implementation functions (not part of the DownloadManager interface).
 
   // Creates a download item for the SavePackage system.
   // Must be called on the UI thread.  Note that the DownloadManager
   // retains ownership.
   virtual DownloadItemImpl* CreateSavePackageDownloadItem(
       const FilePath& main_file_path,
       const GURL& page_url,
       const std::string& mime_type,
       content::DownloadItem::Observer* observer);
 
   // content::DownloadManager functions.
   virtual void SetDelegate(content::DownloadManagerDelegate* delegate) OVERRIDE;
   virtual content::DownloadManagerDelegate* GetDelegate() const OVERRIDE;
   virtual void Shutdown() OVERRIDE;
   virtual void GetTemporaryDownloads(const FilePath& dir_path,
                                      DownloadVector* result) OVERRIDE;
   virtual void GetAllDownloads(const FilePath& dir_path,
                                DownloadVector* result) OVERRIDE;
   virtual void SearchDownloads(const string16& query,
                                DownloadVector* result) OVERRIDE;
   virtual bool Init(content::BrowserContext* browser_context) OVERRIDE;
   virtual content::DownloadId StartDownload(
       scoped_ptr<DownloadCreateInfo> info,
       scoped_ptr<content::ByteStreamReader> stream) OVERRIDE;
-  virtual void UpdateDownload(int32 download_id,
-                              int64 bytes_so_far,
-                              int64 bytes_per_sec,
-                              const std::string& hash_state) OVERRIDE;
-  virtual void OnResponseCompleted(int32 download_id, int64 size,
-                                   const std::string& hash) OVERRIDE;
   virtual void CancelDownload(int32 download_id) OVERRIDE;
-  virtual void OnDownloadInterrupted(
-      int32 download_id,
-      content::DownloadInterruptReason reason) OVERRIDE;
   virtual int RemoveDownloadsBetween(base::Time remove_begin,
                                      base::Time remove_end) OVERRIDE;
   virtual int RemoveDownloads(base::Time remove_begin) OVERRIDE;
   virtual int RemoveAllDownloads() OVERRIDE;
   virtual void DownloadUrl(
       scoped_ptr<content::DownloadUrlParameters> params) OVERRIDE;
   virtual void AddObserver(Observer* observer) OVERRIDE;
   virtual void RemoveObserver(Observer* observer) OVERRIDE;
   virtual void OnPersistentStoreQueryComplete(
       std::vector<content::DownloadPersistentStoreInfo>* entries) OVERRIDE;
   virtual void OnItemAddedToPersistentStore(int32 download_id,
                                             int64 db_handle) OVERRIDE;
   virtual int InProgressCount() const OVERRIDE;
   virtual content::BrowserContext* GetBrowserContext() const OVERRIDE;
   virtual void CheckForHistoryFilesRemoval() OVERRIDE;
   virtual content::DownloadItem* GetDownloadItem(int id) OVERRIDE;
   virtual content::DownloadItem* GetDownload(int id) OVERRIDE;
   virtual void SavePageDownloadFinished(
       content::DownloadItem* download) OVERRIDE;
   virtual content::DownloadItem* GetActiveDownloadItem(int id) OVERRIDE;
   virtual bool GenerateFileHash() OVERRIDE;
 
+  // For testing; specifically, accessed from TestFileErrorInjector.
+  virtual void SetDownloadFileFactoryForTesting(
+      scoped_ptr<content::DownloadFileFactory> file_factory);
+  virtual content::DownloadFileFactory* GetDownloadFileFactoryForTesting();
+
  private:
   typedef std::set<content::DownloadItem*> DownloadSet;
   typedef base::hash_map<int32, DownloadItemImpl*> DownloadMap;
   typedef std::vector<DownloadItemImpl*> DownloadItemImplVector;
 
   // For testing.
   friend class DownloadManagerTest;
   friend class DownloadTest;
 
   friend class base::RefCountedThreadSafe<DownloadManagerImpl>;
 
   virtual ~DownloadManagerImpl();
 
   // Creates the download item.  Must be called on the UI thread.
-  // Returns the |BoundNetLog| used by the |DownloadItem|.
-  virtual net::BoundNetLog CreateDownloadItem(DownloadCreateInfo* info);
+  virtual DownloadItemImpl* CreateDownloadItem(
+      DownloadCreateInfo* info, const net::BoundNetLog& bound_net_log);
 
   // Does nothing if |download_id| is not an active download.
   void MaybeCompleteDownloadById(int download_id);
 
   // Determine if the download is ready for completion, i.e. has had
   // all data saved, and completed the filename determination and
   // history insertion.
   bool IsDownloadReadyForCompletion(DownloadItemImpl* download);
 
   // Show the download in the browser.
@@ skipping 21 matching lines @@
   // Debugging routine to confirm relationship between below
   // containers; no-op if NDEBUG.
   void AssertContainersConsistent() const;
 
   // Add a DownloadItem to history_downloads_.
   void AddDownloadItemToHistory(DownloadItemImpl* item, int64 db_handle);
 
   // Remove from internal maps.
   int RemoveDownloadItems(const DownloadItemImplVector& pending_deletes);
 
-  // Called in response to our request to the DownloadFileManager to
-  // create a DownloadFile.  A |reason| of
-  // content::DOWNLOAD_INTERRUPT_REASON_NONE indicates success.
-  void OnDownloadFileCreated(
-      int32 download_id, content::DownloadInterruptReason reason);
-
   // Called when the delegate has completed determining the download target.
   // Arguments following |download_id| are as per
   // content::DownloadTargetCallback.
   void OnDownloadTargetDetermined(
       int32 download_id,
       const FilePath& target_path,
       content::DownloadItem::TargetDisposition disposition,
       content::DownloadDangerType danger_type,
       const FilePath& intermediate_path);
 
   // Called when a download entry is committed to the persistent store.
   void OnDownloadItemAddedToPersistentStore(DownloadItemImpl* item);
 
   // Called when Save Page As entry is committed to the persistent store.
   void OnSavePageItemAddedToPersistentStore(DownloadItemImpl* item);
 
   // Overridden from DownloadItemImplDelegate
   // (Note that |GetBrowserContext| are present in both interfaces.)
-  virtual DownloadFileManager* GetDownloadFileManager() OVERRIDE;
+  virtual void DelegateStart(DownloadItemImpl* item) OVERRIDE;
   virtual bool ShouldOpenDownload(DownloadItemImpl* item) OVERRIDE;
   virtual bool ShouldOpenFileBasedOnExtension(const FilePath& path) OVERRIDE;
   virtual void CheckForFileRemoval(DownloadItemImpl* download_item) OVERRIDE;
   virtual void MaybeCompleteDownload(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadStopped(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadCompleted(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadOpened(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadRemoved(DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadRenamedToIntermediateName(
       DownloadItemImpl* download) OVERRIDE;
   virtual void DownloadRenamedToFinalName(DownloadItemImpl* download) OVERRIDE;
   virtual void AssertStateConsistent(DownloadItemImpl* download) const OVERRIDE;
 
   // Factory for creation of downloads items.
-  scoped_ptr<content::DownloadItemFactory> factory_;
+  scoped_ptr<content::DownloadItemFactory> item_factory_;
+
+  // Factory for the creation of download files.
+  scoped_ptr<content::DownloadFileFactory> file_factory_;
 
   // |downloads_| is the owning set for all downloads known to the
   // DownloadManager.  This includes downloads started by the user in
   // this session, downloads initialized from the history system, and
   // "save page as" downloads.  All other DownloadItem containers in
   // the DownloadManager are maps; they do not own the DownloadItems.
   // Note that this is the only place (with any functional implications;
   // see save_page_downloads_ below) that "save page as" downloads are
   // kept, as the DownloadManager's only job is to hold onto those
   // until destruction.
   //
   // |active_downloads_| is a map of all downloads that are currently being
-  // processed. The key is the ID assigned by the DownloadFileManager,
-  // which is unique for the current session.
+  // processed.
   //
   // When a download is created through a user action, the corresponding
   // DownloadItem* is placed in |active_downloads_| and remains there until the
   // download is in a terminal state (COMPLETE or CANCELLED).  Once it has a
   // valid handle, the DownloadItem* is placed in the |history_downloads_| map.
   // Downloads from past sessions read from a persisted state from the history
   // system are placed directly into |history_downloads_| since they have valid
   // handles in the history system.
 
   DownloadMap downloads_;
   DownloadMap active_downloads_;
 
   int history_size_;
 
   // True if the download manager has been initialized and requires a shutdown.
   bool shutdown_needed_;
 
   // Observers that want to be notified of changes to the set of downloads.
   ObserverList<Observer> observers_;
 
   // The current active browser context.
   content::BrowserContext* browser_context_;
 
-  // Non-owning pointer for handling file writing on the download_thread_.
-  DownloadFileManager* file_manager_;
-
   // Allows an embedder to control behavior. Guaranteed to outlive this object.
   content::DownloadManagerDelegate* delegate_;
 
   net::NetLog* net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerImpl);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_