Run callback on drop

patches/core/ungoogled-chromium/fix-building-without-safebrowsing.patch

@@ -1963,11 +1963,12 @@
  
 --- a/chrome/browser/ui/views/tab_contents/chrome_web_contents_view_delegate_views.cc
 +++ b/chrome/browser/ui/views/tab_contents/chrome_web_contents_view_delegate_views.cc
-@@ -110,7 +110,6 @@ void ChromeWebContentsViewDelegateViews:
+@@ -110,7 +110,7 @@ void ChromeWebContentsViewDelegateViews:
  void ChromeWebContentsViewDelegateViews::OnPerformDrop(
      const content::DropData& drop_data,
      DropCompletionCallback callback) {
 -  HandleOnPerformDrop(web_contents_, drop_data, std::move(callback));
++  if (!callback.is_null()) std::move(callback).Run(std::move(drop_data));
  }
  
  std::unique_ptr<content::WebContentsViewDelegate> CreateWebContentsViewDelegate(