android: Actually compress traces written to zip files

build/android/adb_profile_chrome.py

 #!/usr/bin/env python
 #
 # Copyright 2013 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 gzip
 import logging
 import optparse
 import os
@@ skipping 165 matching lines @@
 
 
 def _CompressFile(host_file, output):
   with gzip.open(output, 'wb') as out:
     with open(host_file, 'rb') as input_file:
       out.write(input_file.read())
   os.unlink(host_file)
 
 
 def _ArchiveFiles(host_files, output):
-  with zipfile.ZipFile(output, 'w') as z:
+  with zipfile.ZipFile(output, 'w', zipfile.ZIP_DEFLATED) as z:
     for host_file in host_files:
       z.write(host_file)
       os.unlink(host_file)
 
 
 def _PrintMessage(heading, eol='\n'):
   sys.stdout.write('%s%s' % (heading, eol))
   sys.stdout.flush()
 
 
@@ skipping 154 matching lines @@
     return 1
 
   _CaptureAndPullTrace(controllers,
                        options.time if not options.continuous else 0,
                        options.output,
                        options.compress)
 
 
 if __name__ == '__main__':
   sys.exit(main())