Add flag to enable proguard for debug build.

build/android/gyp/apk_obfuscate.py

 #!/usr/bin/env python
 #
 # Copyright 2014 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.
 
 """Generates the obfuscated jar and test jar for an apk.
 
 If proguard is not enabled or 'Release' is not in the configuration name,
 obfuscation will be a no-op.
@@ skipping 17 matching lines @@
   parser.add_option('--proguard-jar-path',
                     help='Path to proguard.jar in the sdk')
   parser.add_option('--input-jars-paths',
                     help='Path to jars to include in obfuscated jar')
 
   parser.add_option('--proguard-configs',
                     help='Paths to proguard config files')
 
   parser.add_option('--configuration-name',
                     help='Gyp configuration name (i.e. Debug, Release)')
+
+  parser.add_option('--debug-build-proguard-enabled', action='store_true',
+                    help='--proguard-enabled takes effect on release '
+                         'build, this flag enable the proguard on debug '
+                         'build.')
   parser.add_option('--proguard-enabled', action='store_true',
                     help='Set if proguard is enabled for this target.')
 
   parser.add_option('--obfuscated-jar-path',
                     help='Output path for obfuscated jar.')
 
   parser.add_option('--testapp', action='store_true',
                     help='Set this if building an instrumentation test apk')
   parser.add_option('--tested-apk-obfuscated-jar-path',
                     help='Path to obfusctated jar of the tested apk')
@@ skipping 70 matching lines @@
   options, _ = ParseArgs(argv)
 
   input_jars = build_utils.ParseGypList(options.input_jars_paths)
 
   if options.testapp:
     dependency_class_filters = [
         '*R.class', '*R$*.class', '*Manifest.class', '*BuildConfig.class']
     build_utils.MergeZips(
         options.test_jar_path, input_jars, dependency_class_filters)
 
-  if options.configuration_name == 'Release' and options.proguard_enabled:
+  if ((options.configuration_name == 'Release' and options.proguard_enabled) or
+     (options.configuration_name == 'Debug' and
+      options.debug_build_proguard_enabled)):
     DoProguard(options)
   else:
     output_files = [
         options.obfuscated_jar_path,
         options.obfuscated_jar_path + '.info',
         options.obfuscated_jar_path + '.dump',
         options.obfuscated_jar_path + '.seeds',
         options.obfuscated_jar_path + '.usage',
         options.obfuscated_jar_path + '.mapping']
     for f in output_files:
       if os.path.exists(f):
         os.remove(f)
       build_utils.Touch(f)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))