[Resumption 8/11] Remove intermediate files when no longer necessary.

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 5dc5aa17b59f3220bc75a47090b8335bd226c7f9..08b163d32be5e9d454e59d1227a04c4afda6faca 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -389,9 +389,11 @@ DownloadItem* DownloadManagerImpl::StartDownload(
   } else {
     DownloadMap::iterator item_iterator = downloads_.find(id.local());
     // Trying to resume an interrupted download.
-    if (item_iterator == downloads_.end()) {
+    if (item_iterator == downloads_.end() ||
+        item_iterator->second->IsCancelled()) {
       // If the download is no longer known to the DownloadManager, then it was
-      // removed after it was resumed. Ignore.
+      // removed after it was resumed. Ignore. If the download is cancelled
+      // while resuming, then also ignore the request.
       info->request_handle.CancelRequest();
       return NULL;
     }