Pull delegate check back into IsDownloadReadyForCompletion so that if

content/browser/download/download_item_impl_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_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
 
 #include "base/callback.h"
 #include "base/file_path.h"
 #include "content/common/content_export.h"
@@ skipping 26 matching lines @@
 
   // Used for catching use-after-free errors.
   void Attach();
   void Detach();
 
   // Request determination of the download target from the delegate.
   virtual void DetermineDownloadTarget(
       DownloadItemImpl* download, const DownloadTargetCallback& callback);
 
   // Allows the delegate to delay completion of the download.  This function
-  // will call the callback passed when the download is ready for completion.
-  // This may be done immediately, from within the routine itself, or it
-  // may be delayed.
-  // This routine should only be called once per download.
-  virtual void ReadyForDownloadCompletion(
+  // will either return true (if the download may complete now) or will return
+  // false and call the provided callback at some future point.  This function
+  // may be called repeatedly.
+  virtual bool ShouldCompleteDownload(
       DownloadItemImpl* download,
       const base::Closure& complete_callback);
 
   // Allows the delegate to override the opening of a download. If it returns
   // true then it's reponsible for opening the item.
   virtual bool ShouldOpenDownload(
       DownloadItemImpl* download, const ShouldOpenDownloadCallback& callback);
 
   // Tests if a file type should be opened automatically.
   virtual bool ShouldOpenFileBasedOnExtension(const FilePath& path);
@@ skipping 24 matching lines @@
  private:
   // For "Outlives attached DownloadItemImpl" invariant assertion.
   int count_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImplDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_