Use previous target path when resuming a download after crash

content/browser/download/download_item_impl_delegate.cc

Index: content/browser/download/download_item_impl_delegate.cc
diff --git a/content/browser/download/download_item_impl_delegate.cc b/content/browser/download/download_item_impl_delegate.cc
index 96be706eee0373c3021b95ce2b80db0f08bea110..4a60d2f0fd12a3a6c062ca7e6deae37d802fb8e3 100644
--- a/content/browser/download/download_item_impl_delegate.cc
+++ b/content/browser/download/download_item_impl_delegate.cc
@@ -29,8 +29,10 @@ void DownloadItemImplDelegate::Detach() {
 
 void DownloadItemImplDelegate::DetermineDownloadTarget(
     DownloadItemImpl* download, const DownloadTargetCallback& callback) {
-  // TODO(rdsmith/asanka): Do something useful if forced file path is null.
-  base::FilePath target_path(download->GetForcedFilePath());
+  // TODO(qinmin): Do something useful if both forced file path and
+  // target file path are null.
+  base::FilePath target_path = download->GetForcedFilePath().empty() ?
+      download->GetTargetFilePath() : download->GetForcedFilePath();
   callback.Run(target_path,
                DownloadItem::TARGET_DISPOSITION_OVERWRITE,
                DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS,