Remove isolate_file variable from breakpad unittest gyp.

breakpad/breakpad.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.
 
 {
   'includes': [
     'breakpad_sender.gypi',
     'breakpad_handler.gypi',
   ],
   'conditions': [
@@ skipping 697 matching lines @@
               ],
               'include_dirs': [
                 'src/common/android/include',
               ],
               'sources': [
                 'src/common/android/breakpad_getcontext_unittest.cc',
               ],
               'variables': {
                 'test_type': 'gtest',
                 'test_suite_name': '<(_target_name)',
-                'isolate_file': 'breakpad_unittests.isolate',
               },
               'includes': [ '../build/android/test_runner.gypi' ],
               'ldflags!': [
                 # We are overriding the build-id above so remove the default.
                 '-Wl,--build-id=sha1',
               ],
             }],
             ['clang==1 and target_arch=="ia32"', {
               'cflags!': [
                 # Clang's -mstackrealign doesn't work well with
@@ skipping 304 matching lines @@
                   'breakpad_unittests_apk.isolate',
                 ],
               },
             ]
           }
         ],
       ],
     }],
   ],
 }