[Android] Generate scripts at build time to run android tests.

media/midi/midi.gyp

 # Copyright 2015 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,
     'conditions': [
       ['(OS=="linux" or OS=="freebsd" or OS=="solaris") and (embedded!=1 or (chromecast==1 and target_arch!="arm"))', {
         'use_alsa%': 1,
@@ skipping 168 matching lines @@
         {
           # TODO(GN)
           'target_name': 'midi_unittests_apk',
           'type': 'none',
           'dependencies': [
             'midi_java',
             'midi_unittests',
           ],
           'variables': {
             'test_suite_name': 'midi_unittests',
+            'isolate_file': 'midi_unittests.isolate',
           },
           'includes': ['../../build/apk_test.gypi'],
         },
         {
           # GN: //media/midi:midi_java
           'target_name': 'midi_java',
           'type': 'none',
           'dependencies': [
             '../../base/base.gyp:base',
           ],
@@ skipping 29 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             'midi_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }