Don't use sys.exit() in build_utils.CheckCallDie().

build/android/gyp/proguard.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 fnmatch
 import optparse
 import os
 import sys
 
 from util import build_utils
 
 def DoProguard(options):
   injars = options.input_path
   outjars = options.output_path
   classpath = build_utils.ParseGypList(options.classpath)
   classpath = list(set(classpath))
   libraryjars = ':'.join(classpath)
   # proguard does its own dependency checking, which can be avoided by deleting
   # the output.
   if os.path.exists(options.output_path):
     os.remove(options.output_path)
   proguard_cmd = [options.proguard_path,
                   '-injars', injars,
                   '-outjars', outjars,
                   '-libraryjars', libraryjars,
                   '@' + options.proguard_config]
-  build_utils.CheckCallDie(proguard_cmd)
+  build_utils.CheckOutput(proguard_cmd, print_stdout=True)
+
 
 def main(argv):
   parser = optparse.OptionParser()
   parser.add_option('--proguard-path',
                     help='Path to the proguard executable.')
   parser.add_option('--input-path',
                     help='Path to the .jar file proguard should run on.')
   parser.add_option('--output-path', help='Path to the generated .jar file.')
   parser.add_option('--proguard-config',
                     help='Path to the proguard configuration file.')
   parser.add_option('--classpath', help="Classpath for proguard.")
   parser.add_option('--stamp', help='Path to touch on success.')
 
   # TODO(newt): remove this once http://crbug.com/177552 is fixed in ninja.
   parser.add_option('--ignore', help='Ignored.')
 
   options, _ = parser.parse_args()
 
   DoProguard(options)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))