[Downloads] Prevent dangerous files from being opened automatically.

chrome/browser/download/download_commands.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/download/download_commands.h"
 
 #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"
 #include "chrome/browser/safe_browsing/download_protection_service.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/google/core/browser/google_util.h"
@@ skipping 61 matching lines @@
       return download_item_->CanShowInFolder();
     case OPEN_WHEN_COMPLETE:
     case PLATFORM_OPEN:
       return download_item_->CanOpenDownload() &&
              !download_crx_util::IsExtensionDownload(*download_item_);
     case ALWAYS_OPEN_TYPE:
       // For temporary downloads, the target filename might be a temporary
       // 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();
     case PAUSE:
       return !download_item_->IsDone() && !download_item_->IsPaused() &&
              download_item_->GetState() == content::DownloadItem::IN_PROGRESS;
     case RESUME:
       return download_item_->CanResume() &&
              (download_item_->IsPaused() ||
               download_item_->GetState() != content::DownloadItem::IN_PROGRESS);
@@ skipping 138 matching lines @@
     is_adobe_pdf_reader_up_to_date =
         DownloadTargetDeterminer::IsAdobeReaderUpToDate();
   }
   return IsDownloadPdf() &&
          (IsAdobeReaderDefaultPDFViewer() ? is_adobe_pdf_reader_up_to_date
                                           : true);
 #elif defined(OS_MACOSX) || defined(OS_LINUX)
   return IsDownloadPdf();
 #endif
 }