Remove package_name from java_apk.gypi

build/android/tests/multiple_proguards/multiple_proguards.gyp

 # Copyright (c) 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.
 {
   'variables': {
     'chromium_code': 1,
-    'package_name': 'multiple_proguard',
   },
   'targets': [
     {
       'target_name': 'multiple_proguards_test_apk',
       'type': 'none',
       'variables': {
         'app_manifest_version_name%': '<(android_app_version_name)',
         'java_in_dir': '.',
         'proguard_enabled': 'true',
         'proguard_flags_paths': [
           'proguard1.flags',
           'proguard2.flags',
         ],
         'R_package': 'dummy',
         'R_package_relpath': 'dummy',
         'apk_name': 'MultipleProguards',
         # This is a build-only test. There's nothing to install.
         'gyp_managed_install': 0,
       },
       'dependencies': [
         # guava has references to objects using reflection which
         # should be ignored in proguard step.
         '../../../../third_party/guava/guava.gyp:guava_javalib',
       ],
       'includes': [ '../../../../build/java_apk.gypi' ],
     },
   ],
 }