DownloadManagerDelegate::ShouldCompleteDownload(callback)

content/browser/download/download_manager_impl.cc

Index: content/browser/download/download_manager_impl.cc
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index f67709242b034ed7549453128800b11b6c09bb14..867808e873938317175bbc47d379e1bbfb1fd74c 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -548,8 +548,7 @@ void DownloadManagerImpl::OnResponseCompleted(int32 download_id,
 
   DownloadItem* download = active_downloads_[download_id];
   download->OnAllDataSaved(size, hash);
-
-  download->MaybeCompleteDownload();
+  MaybeCompleteDownload(download);
 }
 
 void DownloadManagerImpl::AssertStateConsistent(DownloadItem* download) const {
@@ -641,8 +640,14 @@ void DownloadManagerImpl::MaybeCompleteDownload(DownloadItem* download) {
   DCHECK(download->IsPersisted());
   DCHECK_EQ(1u, history_downloads_.count(download->GetDbHandle()));
 
-  // Give the delegate a chance to override.
-  if (!delegate_->ShouldCompleteDownload(download))
+  // Give the delegate a chance to override.  It's ok to keep re-setting the
+  // delegate's |complete_callback| cb as long as there isn't another call-point
+  // trying to set it to a different cb.  TODO(benjhayden): Change the callback
+  // to point directly to the item instead of |this| when DownloadItem supports
+  // weak-ptrs.
+  if (!delegate_->ShouldCompleteDownload(download, base::Bind(
+          &DownloadManagerImpl::MaybeCompleteDownloadById,
+          this, download->GetId())))
     return;
 
   VLOG(20) << __FUNCTION__ << "()" << " executing: download = "
@@ -657,6 +662,12 @@ void DownloadManagerImpl::MaybeCompleteDownload(DownloadItem* download) {
   download->OnDownloadCompleting(file_manager_);
 }
 
+void DownloadManagerImpl::MaybeCompleteDownloadById(int download_id) {
+  DownloadItem* download_item = GetActiveDownload(download_id);
+  if (download_item != NULL)
+    MaybeCompleteDownload(download_item);
+}
+
 void DownloadManagerImpl::DownloadCompleted(DownloadItem* download) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(download);