Replace a data file used in download tests with a much smaller one.

chrome/test/functional/downloads.py

 #!/usr/bin/python
 # Copyright (c) 2010 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.
 
 import filecmp
 import logging
 import os
 import shutil
 import sys
@@ skipping 26 matching lines @@
         if name not in self._existing_downloads:
           self.files_to_remove.append(os.path.join(download_dir, name))
     pyauto.PyUITest.tearDown(self)
     for item in self.files_to_remove:
       pyauto_utils.RemovePath(item)
 
   def _GetDangerousDownload(self):
     """Returns the file url for a dangerous download for this OS."""
     sub_path = os.path.join(self.DataDir(), 'downloads', 'dangerous')
     if self.IsMac():
-      return os.path.join(sub_path, 'dangerous.dmg')
+      return os.path.join(sub_path, 'invalid-dummy.dmg')
     return os.path.join(sub_path, 'dangerous.exe')
 
   def _EqualFileContents(self, file1, file2):
     """Determine if 2 given files have the same contents."""
     if not (os.path.exists(file1) and os.path.exists(file2)):
       return False
     return filecmp.cmp(file1, file2, shallow=False)
 
   def _GetDownloadId(self, download_index=0):
     """Return the download id for the download at the given index.
@@ skipping 355 matching lines @@
     self.PerformActionOnDownload(self._GetDownloadId(),
                                  'save_dangerous_download')
     # Wait for the theme to be set automatically.
     self.assertTrue(self.WaitUntilDownloadedThemeSet('camo theme'))
     self.assertTrue(self.WaitUntil(lambda path: not os.path.exists(path),
                                    args=[downloaded_pkg]))
 
 
 if __name__ == '__main__':
   pyauto_functional.Main()