Add flag to enable proguard for debug build.

build/android/gyp/dex.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 logging
 import optparse
 import os
 import sys
@@ skipping 31 matching lines @@
   parser.add_option('--android-sdk-tools',
                     help='Android sdk build tools directory.')
   parser.add_option('--output-directory',
                     default=os.getcwd(),
                     help='Path to the output build directory.')
   parser.add_option('--dex-path', help='Dex output path.')
   parser.add_option('--configuration-name',
                     help='The build CONFIGURATION_NAME.')
   parser.add_option('--proguard-enabled',
                     help='"true" if proguard is enabled.')
+  parser.add_option('--debug-build-proguard-enabled',
+                    help='"true" if proguard is enabled for debug build.')
   parser.add_option('--proguard-enabled-input-path',
                     help=('Path to dex in Release mode when proguard '
                           'is enabled.'))
   parser.add_option('--no-locals',
                     help='Exclude locals list from the dex file.')
   parser.add_option('--multi-dex', default=False, action='store_true',
                     help='Create multiple dex files.')
   parser.add_option('--incremental',
                     action='store_true',
                     help='Enable incremental builds when possible.')
@@ skipping 75 matching lines @@
 
 def _OnStaleMd5(changes, options, dex_cmd, paths):
   _RunDx(changes, options, dex_cmd, paths)
   build_utils.WriteJson(
       [os.path.relpath(p, options.output_directory) for p in paths],
       options.dex_path + '.inputs')
 
 
 def main(args):
   options, paths = _ParseArgs(args)
-  if (options.proguard_enabled == 'true'
-      and options.configuration_name == 'Release'):
+  if ((options.proguard_enabled == 'true'
+          and options.configuration_name == 'Release')
+      or (options.debug_build_proguard_enabled == 'true'
+          and options.configuration_name == 'Debug')):
     paths = [options.proguard_enabled_input_path]
 
   if options.inputs:
     paths += options.inputs
 
   if options.excluded_paths:
     # Excluded paths are relative to the output directory.
     exclude_paths = options.excluded_paths
     paths = [p for p in paths if not
              os.path.relpath(p, options.output_directory) in exclude_paths]
@@ skipping 30 matching lines @@
       options,
       input_paths=input_paths,
       input_strings=dex_cmd,
       output_paths=output_paths,
       force=force,
       pass_changes=True)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))