Enable "Hide Extension" option when "Save Link As" on the Mac

content/browser/download/download_item_impl.cc

Index: content/browser/download/download_item_impl.cc
diff --git a/content/browser/download/download_item_impl.cc b/content/browser/download/download_item_impl.cc
index 33de9d6cf705e44bffdbb9e0c1de9704be2a0bc9..80f939d49724249dccfb87e540c7c2b3014d18ad 100644
--- a/content/browser/download/download_item_impl.cc
+++ b/content/browser/download/download_item_impl.cc
@@ -1170,7 +1170,8 @@ void DownloadItemImpl::OnDownloadTargetDetermined(
     const base::FilePath& target_path,
     TargetDisposition disposition,
     DownloadDangerType danger_type,
-    const base::FilePath& intermediate_path) {
+    const base::FilePath& intermediate_path,
+    bool hide_file_extension) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   // If the |target_path| is empty, then we consider this download to be
@@ -1220,6 +1221,10 @@ void DownloadItemImpl::OnDownloadTargetDetermined(
   //               http://crbug.com/74187.
   DCHECK(!is_save_package_download_);
   DCHECK(download_file_.get());
+  if (hide_file_extension) {
+    download_file_.get()->SetHideFileExtension(true);
+    SetDisplayName(target_path_.BaseName().RemoveExtension());
+  }
   DownloadFile::RenameCompletionCallback callback =
       base::Bind(&DownloadItemImpl::OnDownloadRenamedToIntermediateName,
                  weak_ptr_factory_.GetWeakPtr());