Revert of Fix sbox_validation_tests & Make isolate_driver.py include the executable itself

extensions/extensions_unittests.isolate

 # 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.
 {
   'conditions': [
     ['use_x11==0', {
       'variables': {
         'command': [
           '../testing/test_env.py',
           '<(PRODUCT_DIR)/extensions_unittests<(EXECUTABLE_SUFFIX)',
@@ skipping 21 matching lines @@
           '../testing/xvfb.py',
           '<(PRODUCT_DIR)/xdisplaycheck<(EXECUTABLE_SUFFIX)',
         ],
       },
     }],
     ['OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'files': [
           '../chrome/test/data/extensions/',
           '../testing/test_env.py',
+          '<(PRODUCT_DIR)/extensions_unittests<(EXECUTABLE_SUFFIX)',
           '<(PRODUCT_DIR)/extensions_shell_and_test.pak',
           'test/data/',
         ],
       },
     }],
     ['OS=="linux"', {
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/libosmesa.so',
         ],
@@ skipping 12 matching lines @@
           '<(PRODUCT_DIR)/osmesa.dll',
         ],
       },
     }],
   ],
   'includes': [
     '../base/base.isolate',
     '../gin/v8.isolate',
   ],
 }