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

base/base.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,
   },
   'includes': [
     '../build/win_precompile.gypi',
@@ skipping 1540 matching lines @@
         {
           # GN: //base:base_unittests_apk
           'target_name': 'base_unittests_apk',
           'type': 'none',
           'dependencies': [
             'base_java',
             'base_unittests',
           ],
           'variables': {
             'test_suite_name': 'base_unittests',
+            'isolate_file': 'base_unittests.isolate',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
     ['OS == "win"', {
       'targets': [
         {
           'target_name': 'debug_message',
           'type': 'executable',
@@ skipping 49 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }