Modifying the "dangerous download" algorithm.

chrome/browser/download/download_prefs.cc

Index: chrome/browser/download/download_prefs.cc
diff --git a/chrome/browser/download/download_prefs.cc b/chrome/browser/download/download_prefs.cc
index 8673e0ac4e5a5302e569acc221a67bbfe4ad80ca..62c5b35ea137e7f0a5fa0d3c6f01a102f0e7485b 100644
--- a/chrome/browser/download/download_prefs.cc
+++ b/chrome/browser/download/download_prefs.cc
@@ -30,7 +30,7 @@ DownloadPrefs::DownloadPrefs(PrefService* prefs) : prefs_(prefs) {
 #elif defined(OS_WIN)
     FilePath path(UTF8ToWide(extensions[i]));
 #endif
-    if (!extensions[i].empty() && !download_util::IsExecutableFile(path))
+    if (!extensions[i].empty() && download_util::IsFileSafe(path))
       auto_open_.insert(path.value());
   }
 }
@@ -87,7 +87,7 @@ bool DownloadPrefs::EnableAutoOpenBasedOnExtension(const FilePath& file_name) {
     return false;
   DCHECK(extension[0] == FilePath::kExtensionSeparator);
   extension.erase(0, 1);
-  if (download_util::IsExecutableExtension(extension))
+  if (!download_util::IsFileExtensionSafe(extension))
     return false;
 
   auto_open_.insert(extension);