Pull delegate check back into IsDownloadReadyForCompletion so that if

content/public/browser/download_manager_delegate.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_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/file_path.h"
@@ skipping 67 matching lines @@
   // download has started, but the TabConetnts has gone away. This lets an
   // delegate return an alternative WebContents. The delegate can return NULL.
   virtual WebContents* GetAlternativeWebContentsToNotifyForDownload();
 
   // Tests if a file type should be opened automatically.
   virtual bool ShouldOpenFileBasedOnExtension(const FilePath& path);
 
   // Allows the delegate to delay completion of the download.  This function
   // will either return true (in which case the download may complete)
   // or will call the callback passed when the download is ready for
-  // completion.  This routine should only be called once per download.
+  // completion.  This routine may be called multiple times; once it has
+  // returned true for a particular download it should continue to return
+  // true for that download.
   virtual bool ShouldCompleteDownload(
       DownloadItem* item,
       const base::Closure& complete_callback);
 
   // Allows the delegate to override opening the download. If this function
   // returns false, the delegate needs to call callback when it's done
   // with the item, and is responsible for opening it.  This function is called
   // after the final rename, but before the download state is set to COMPLETED.
   virtual bool ShouldOpenDownload(DownloadItem* item,
                                   const DownloadOpenDelayedCallback& callback);
@@ skipping 16 matching lines @@
                               const SavePackagePathPickedCallback& callback) {
   }
 
  protected:
   virtual ~DownloadManagerDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_