Preliminary work on resuming downloads whose connections have expired.

chrome/browser/download/download_util.h

 // Copyright (c) 2010 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.
 //
 // Download utilities.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_
 #pragma once
 
@@ skipping 123 matching lines @@
 
 void PaintDownloadComplete(gfx::Canvas* canvas,
 #if defined(TOOLKIT_VIEWS)
                            views::View* containing_view,
 #endif
                            int origin_x,
                            int origin_y,
                            double animation_progress,
                            PaintDownloadProgressSize size);
 
+void PaintDownloadInterrupted(gfx::Canvas* canvas,
+#if defined(TOOLKIT_VIEWS)
+                              views::View* containing_view,
+#endif
+                              int origin_x,
+                              int origin_y,
+                              double animation_progress,
+                              PaintDownloadProgressSize size);
+
 // Drag support ----------------------------------------------------------------
 
 // Helper function for download views to use when acting as a drag source for a
 // DownloadItem. If |icon| is NULL, no image will be accompany the drag. |view|
 // is only required for Mac OS X, elsewhere it can be NULL.
 void DragDownload(const DownloadItem* download,
                   SkBitmap* icon,
                   gfx::NativeView view);
 
 // Executable file support -----------------------------------------------------
@@ skipping 37 matching lines @@
 // Download the URL. Must be called on the IO thread.
 void DownloadUrl(const GURL& url,
                  const GURL& referrer,
                  const std::string& referrer_charset,
                  const DownloadSaveInfo& save_info,
                  ResourceDispatcherHost* rdh,
                  int render_process_host_id,
                  int render_view_id,
                  URLRequestContextGetter* request_context_getter);
 
+// Restart the URL download.  Must be called on the IO thread.
+void RestartDownloadUrl(ResourceDispatcherHost* rdh,
+                        const GURL& url,
+                        const GURL& referrer,
+                        const FilePath& path,
+                        int64 start_offset,
+                        int render_process_host_id,
+                        int render_view_id);
+
 // Tells the resource dispatcher host to cancel a download request.
 // Must be called on the IO thread.
 void CancelDownloadRequest(ResourceDispatcherHost* rdh,
                            int render_process_id,
                            int request_id);
 
 // Same as GetUniquePathNumber, except that it also checks the existence
 // of its .crdownload intermediate path.
 // If |path| does not exist, 0 is returned.  If it fails to find such
 // a number, -1 is returned.
 int GetUniquePathNumberWithCrDownload(const FilePath& path);
 
 // Returns a .crdownload intermediate path for the |suggested_path|.
 FilePath GetCrDownloadPath(const FilePath& suggested_path);
 
+// Removes a .crdownload from |cr_path| to get the original path.
+FilePath RemoveCrDownloadPath(const FilePath& cr_path);
+
+// Checks if the |path| is a temporary (.crdownload) path.
+bool IsCrDownloadPath(const FilePath& path);
+
 }  // namespace download_util
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_UTIL_H_