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

media/media.gyp

 # Copyright (c) 2012 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,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 1658 matching lines @@
         {
           # TODO(GN)
           'target_name': 'media_unittests_apk',
           'type': 'none',
           'dependencies': [
             'media_java',
             'media_unittests',
           ],
           'variables': {
             'test_suite_name': 'media_unittests',
+            'isolate_file': 'media_unittests.isolate',
           },
           'includes': ['../build/apk_test.gypi'],
         },
         {
           # TODO(GN)
           'target_name': 'media_perftests_apk',
           'type': 'none',
           'dependencies': [
             'media_java',
             'media_perftests',
           ],
           'variables': {
             'test_suite_name': 'media_perftests',
+            'isolate_file': 'media_perftests.isolate',
           },
           'includes': ['../build/apk_test.gypi'],
         },
         {
           # GN: //media/base/android:media_android_jni_headers
           'target_name': 'media_android_jni_headers',
           'type': 'none',
           'sources': [
             'base/android/java/src/org/chromium/media/AudioManagerAndroid.java',
             'base/android/java/src/org/chromium/media/AudioRecordInput.java',
@@ skipping 260 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'audio_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }