Preliminary work on resuming downloads whose connections have expired.

chrome/browser/download/download_util.h

Index: chrome/browser/download/download_util.h
diff --git a/chrome/browser/download/download_util.h b/chrome/browser/download/download_util.h
index 37e8a82a350b311dfec0d94efaf34e01836332d0..755c871ed323ef5cc2c246793d7ec139198e97e3 100644
--- a/chrome/browser/download/download_util.h
+++ b/chrome/browser/download/download_util.h
@@ -141,6 +141,15 @@ void PaintDownloadComplete(gfx::Canvas* canvas,
                            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
@@ -198,6 +207,15 @@ void DownloadUrl(const GURL& url,
                  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,
@@ -213,6 +231,12 @@ 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_