Move the download code to new directories:

chrome/browser/download_file.h

Index: chrome/browser/download_file.h
===================================================================
--- chrome/browser/download_file.h	(revision 2162)
+++ chrome/browser/download_file.h	(working copy)
@@ -1,273 +0,0 @@
-// Copyright (c) 2006-2008 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.
-//
-// Objects that handle file operations for downloads, on the download thread.
-//
-// The DownloadFileManager owns a set of DownloadFile objects, each of which
-// represent one in progress download and performs the disk IO for that
-// download. The DownloadFileManager itself is a singleton object owned by the
-// ResourceDispatcherHost.
-//
-// The DownloadFileManager uses the file_thread for performing file write
-// operations, in order to avoid disk activity on either the IO (network) thread
-// and the UI thread. It coordinates the notifications from the network and UI.
-//
-// A typical download operation involves multiple threads:
-//
-// Updating an in progress download
-// io_thread
-//      |----> data ---->|
-//                     file_thread (writes to disk)
-//                              |----> stats ---->|
-//                                              ui_thread (feedback for user and
-//                                                         updates to history)
-//
-// Cancel operations perform the inverse order when triggered by a user action:
-// ui_thread (user click)
-//    |----> cancel command ---->|
-//                          file_thread (close file)
-//                                 |----> cancel command ---->|
-//                                                    io_thread (stops net IO
-//                                                               for download)
-//
-// The DownloadFileManager tracks download requests, mapping from a download
-// ID (unique integer created in the IO thread) to the DownloadManager for the
-// tab (profile) where the download was initiated. In the event of a tab closure
-// during a download, the DownloadFileManager will continue to route data to the
-// appropriate DownloadManager. In progress downloads are cancelled for a
-// DownloadManager that exits (such as when closing a profile).
-
-#ifndef CHROME_BROWSER_DOWNLOAD_FILE_H__
-#define CHROME_BROWSER_DOWNLOAD_FILE_H__
-
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/hash_tables.h"
-#include "base/lock.h"
-#include "base/ref_counted.h"
-#include "base/thread.h"
-#include "base/timer.h"
-#include "chrome/browser/history/download_types.h"
-
-class DownloadManager;
-class GURL;
-class MessageLoop;
-class ResourceDispatcherHost;
-class URLRequestContext;
-
-// DownloadBuffer --------------------------------------------------------------
-
-// This container is created and populated on the io_thread, and passed to the
-// file_thread for writing. In order to avoid flooding the file_thread with too
-// many small write messages, each write is appended to the DownloadBuffer while
-// waiting for the task to run on the file_thread. Access to the write buffers
-// is synchronized via the lock. Each entry in 'contents' represents one data
-// buffer and its size in bytes.
-
-struct DownloadBuffer {
-  Lock lock;
-  typedef std::pair<char *, int> Contents;
-  std::vector<Contents> contents;
-};
-
-// DownloadFile ----------------------------------------------------------------
-
-// These objects live exclusively on the download thread and handle the writing
-// operations for one download. These objects live only for the duration that
-// the download is 'in progress': once the download has been completed or
-// cancelled, the DownloadFile is destroyed.
-class DownloadFile {
- public:
-  DownloadFile(const DownloadCreateInfo* info);
-  ~DownloadFile();
-
-  bool Initialize();
-
-  // Write a new chunk of data to the file. Returns true on success.
-  bool AppendDataToFile(const char* data, int data_len);
-
-  // Abort the download and automatically close the file.
-  void Cancel();
-
-  // Rename the download file. Returns 'true' if the rename was successful.
-  bool Rename(const std::wstring& full_path);
-
-  // Accessors.
-  int64 bytes_so_far() const { return bytes_so_far_; }
-  int id() const { return id_; }
-  std::wstring full_path() const { return full_path_; }
-  int render_process_id() const { return render_process_id_; }
-  int render_view_id() const { return render_view_id_; }
-  int request_id() const { return request_id_; }
-  bool path_renamed() const { return path_renamed_; }
-  bool in_progress() const { return file_ != NULL; }
-  void set_in_progress(bool in_progress) { in_progress_ = in_progress; }
-
- private:
-  // Open or Close the OS file handle. The file is opened in the constructor
-  // based on creation information passed to it, and automatically closed in
-  // the destructor.
-  void Close();
-  bool Open(const wchar_t* open_mode);
-
-  // OS file handle for writing
-  FILE* file_;
-
-  // The unique identifier for this download, assigned at creation by
-  // the DownloadFileManager for its internal record keeping.
-  int id_;
-
-  // IDs for looking up the tab we are associated with.
-  int render_process_id_;
-  int render_view_id_;
-
-  // Handle for informing the ResourceDispatcherHost of a UI based cancel.
-  int request_id_;
-
-  // Amount of data received up to this point. We may not know in advance how
-  // much data to expect since some servers don't provide that information.
-  int64 bytes_so_far_;
-
-  // Full path to the downloaded file.
-  std::wstring full_path_;
-
-  // Whether the download is still using its initial temporary path.
-  bool path_renamed_;
-
-  // Whether the download is still receiving data.
-  bool in_progress_;
-
-  DISALLOW_EVIL_CONSTRUCTORS(DownloadFile);
-};
-
-
-// DownloadFileManager ---------------------------------------------------------
-
-// Manages all in progress downloads.
-class DownloadFileManager
-    : public base::RefCountedThreadSafe<DownloadFileManager> {
- public:
-  DownloadFileManager(MessageLoop* ui_loop, ResourceDispatcherHost* rdh);
-  ~DownloadFileManager();
-
-  // Lifetime management functions, called on the UI thread.
-  void Initialize();
-  void Shutdown();
-
-  // Called on the IO thread
-  int GetNextId();
-
-  // Handlers for notifications sent from the IO thread and run on the
-  // download thread.
-  void StartDownload(DownloadCreateInfo* info);
-  void UpdateDownload(int id, DownloadBuffer* buffer);
-  void CancelDownload(int id);
-  void DownloadFinished(int id, DownloadBuffer* buffer);
-
-  // Handlers for notifications sent from the download thread and run on
-  // the UI thread.
-  void OnStartDownload(DownloadCreateInfo* info);
-  void OnDownloadFinished(int id, int64 bytes_so_far);
-
-  // Download the URL. Called on the UI thread and forwarded to the
-  // ResourceDispatcherHost on the IO thread.
-  void DownloadUrl(const GURL& url,
-                   const GURL& referrer,
-                   int render_process_host_id,
-                   int render_view_id,
-                   URLRequestContext* request_context);
-
-  // Run on the IO thread to initiate the download of a URL.
-  void OnDownloadUrl(const GURL& url,
-                     const GURL& referrer,
-                     int render_process_host_id,
-                     int render_view_id,
-                     URLRequestContext* request_context);
-
-  // Called on the UI thread to remove a download item or manager.
-  void RemoveDownloadManager(DownloadManager* manager);
-  void RemoveDownload(int id, DownloadManager* manager);
-
-  // Handler for shell operations sent from the UI to the download thread.
-  void OnShowDownloadInShell(const std::wstring full_path);
-  // Handler to open or execute a downloaded file.
-  void OnOpenDownloadInShell(const std::wstring full_path,
-                             const std::wstring& url, HWND parent_window);
-
-  // The download manager has provided a final name for a download. Sent from
-  // the UI thread and run on the download thread.
-  void OnFinalDownloadName(int id, const std::wstring& full_path);
-
-  // Timer notifications.
-  void UpdateInProgressDownloads();
-
-  MessageLoop* file_loop() const { return file_loop_; }
-
-  // Called by the download manager at initialization to ensure the default
-  // download directory exists.
-  void CreateDirectory(const std::wstring& directory);
-
- private:
-  // Timer helpers for updating the UI about the current progress of a download.
-  void StartUpdateTimer();
-  void StopUpdateTimer();
-
-  // Clean up helper that runs on the download thread.
-  void OnShutdown();
-
-  // Called only on UI thread to get the DownloadManager for a tab's profile.
-  static DownloadManager* DownloadManagerFromRenderIds(int render_process_id,
-                                                       int review_view_id);
-  DownloadManager* LookupManager(int download_id);
-
-  // Called only on the download thread.
-  DownloadFile* LookupDownload(int id);
-
-  // Called on the UI thread to remove a download from the UI progress table.
-  void RemoveDownloadFromUIProgress(int id);
-
-  // Unique ID for each DownloadFile.
-  int next_id_;
-
-  // A map of all in progress downloads.
-  typedef base::hash_map<int, DownloadFile*> DownloadFileMap;
-  DownloadFileMap downloads_;
-
-  // Throttle updates to the UI thread.
-  base::RepeatingTimer<DownloadFileManager> update_timer_;
-
-  // The MessageLoop that the DownloadManagers live on.
-  MessageLoop* ui_loop_;
-
-  // The MessageLoop that the this objects primarily operates on.
-  MessageLoop* file_loop_;
-
-  // Used only for DCHECKs!
-  MessageLoop* io_loop_;
-
-  ResourceDispatcherHost* resource_dispatcher_host_;
-
-  // Tracking which DownloadManager to send data to, called only on UI thread.
-  // DownloadManagerMap maps download IDs to their DownloadManager.
-  typedef base::hash_map<int, DownloadManager*> DownloadManagerMap;
-  DownloadManagerMap managers_;
-
-  // RequestMap maps a DownloadManager to all in-progress download IDs.
-  // Called only on the UI thread.
-  typedef base::hash_set<int> DownloadRequests;
-  typedef base::hash_map<DownloadManager*, DownloadRequests> RequestMap;
-  RequestMap requests_;
-
-  // Used for progress updates on the UI thread, mapping download->id() to bytes
-  // received so far. Written to by the file thread and read by the UI thread.
-  typedef base::hash_map<int, int64> ProgressMap;
-  ProgressMap ui_progress_;
-  Lock progress_lock_;
-
-  DISALLOW_EVIL_CONSTRUCTORS(DownloadFileManager);
-};
-
-#endif  // CHROME_BROWSER_DOWNLOAD_FILE_H__