[Downloads] Prevent dangerous files from being opened automatically.

chrome/browser/download/download_commands.cc

Index: chrome/browser/download/download_commands.cc
diff --git a/chrome/browser/download/download_commands.cc b/chrome/browser/download/download_commands.cc
index 52bfe0e931d04a2d17c396af546e45af6d0e2829..39906066c58d82a1eb38e94dd0454d830a8fba39 100644
--- a/chrome/browser/download/download_commands.cc
+++ b/chrome/browser/download/download_commands.cc
@@ -7,6 +7,7 @@
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_crx_util.h"
+#include "chrome/browser/download/download_extensions.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ -88,6 +89,8 @@ bool DownloadCommands::IsCommandEnabled(Command command) const {
       // filename. Don't base an "Always open" decision based on it. Also
       // exclude extensions.
       return download_item_->CanOpenDownload() &&
+             download_util::IsAllowedToOpenAutomatically(
+                 download_item_->GetTargetFilePath()) &&
              !download_crx_util::IsExtensionDownload(*download_item_);
     case CANCEL:
       return !download_item_->IsDone();