Revert 154294 - Remove DownloadFileManager in favor of direct ownership of DownloadFiles.

content/browser/download/download_file_impl.h

Index: content/browser/download/download_file_impl.h
===================================================================
--- content/browser/download/download_file_impl.h	(revision 154444)
+++ content/browser/download/download_file_impl.h	(working copy)
@@ -14,14 +14,13 @@
 #include "base/timer.h"
 #include "content/browser/download/base_file.h"
 #include "content/browser/download/byte_stream.h"
-#include "content/public/browser/download_save_info.h"
+#include "content/browser/download/download_request_handle.h"
 #include "net/base/net_log.h"
 
 struct DownloadCreateInfo;
 
 namespace content {
 class ByteStreamReader;
-class DownloadDestinationObserver;
 class DownloadManager;
 class PowerSaveBlocker;
 }
@@ -30,27 +29,17 @@
  public:
   // Takes ownership of the object pointed to by |request_handle|.
   // |bound_net_log| will be used for logging the download file's events.
-  // May be constructed on any thread.  All methods besides the constructor
-  // (including destruction) must occur on the FILE thread.
-  //
-  // Note that the DownloadFileImpl automatically reads from the passed in
-  // stream, and sends updates and status of those reads to the
-  // DownloadDestinationObserver.
-  DownloadFileImpl(
-    const content::DownloadSaveInfo& save_info,
-    const GURL& url,
-    const GURL& referrer_url,
-    int64 received_bytes,
-    bool calculate_hash,
-    scoped_ptr<content::ByteStreamReader> stream,
-    const net::BoundNetLog& bound_net_log,
-    scoped_ptr<content::PowerSaveBlocker> power_save_blocker,
-    base::WeakPtr<content::DownloadDestinationObserver> observer);
-
+  DownloadFileImpl(const DownloadCreateInfo* info,
+                   scoped_ptr<content::ByteStreamReader> stream,
+                   DownloadRequestHandleInterface* request_handle,
+                   scoped_refptr<content::DownloadManager> download_manager,
+                   bool calculate_hash,
+                   scoped_ptr<content::PowerSaveBlocker> power_save_blocker,
+                   const net::BoundNetLog& bound_net_log);
   virtual ~DownloadFileImpl();
 
   // DownloadFile functions.
-  virtual void Initialize(const InitializeCallback& callback) OVERRIDE;
+  virtual content::DownloadInterruptReason Initialize() OVERRIDE;
   virtual void Rename(const FilePath& full_path,
                       bool overwrite_existing_file,
                       const RenameCompletionCallback& callback) OVERRIDE;
@@ -63,6 +52,11 @@
   virtual int64 CurrentSpeed() const OVERRIDE;
   virtual bool GetHash(std::string* hash) OVERRIDE;
   virtual std::string GetHashState() OVERRIDE;
+  virtual void CancelDownloadRequest() OVERRIDE;
+  virtual int Id() const OVERRIDE;
+  virtual content::DownloadManager* GetDownloadManager() OVERRIDE;
+  virtual const content::DownloadId& GlobalId() const OVERRIDE;
+  virtual std::string DebugString() const OVERRIDE;
 
  protected:
   // For test class overrides.
@@ -86,9 +80,20 @@
   // with DownloadFile and get rid of BaseFile.
   scoped_ptr<content::ByteStreamReader> stream_reader_;
 
+  // The unique identifier for this download, assigned at creation by
+  // the DownloadFileManager for its internal record keeping.
+  content::DownloadId id_;
+
   // Used to trigger progress updates.
   scoped_ptr<base::RepeatingTimer<DownloadFileImpl> > update_timer_;
 
+  // The handle to the request information.  Used for operations outside the
+  // download system, specifically canceling a download.
+  scoped_ptr<DownloadRequestHandleInterface> request_handle_;
+
+  // DownloadManager this download belongs to.
+  scoped_refptr<content::DownloadManager> download_manager_;
+
   // Statistics
   size_t bytes_seen_;
   base::TimeDelta disk_writes_time_;
@@ -96,8 +101,6 @@
 
   net::BoundNetLog bound_net_log_;
 
-  base::WeakPtr<content::DownloadDestinationObserver> observer_;
-
   base::WeakPtrFactory<DownloadFileImpl> weak_factory_;
 
   // RAII handle to keep the system from sleeping while we're downloading.