[swarming] Add isolate driver.

build/isolate.gypi

 # Copyright 2015 the V8 project authors. All rights reserved.
 # 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.
 
 # This file is meant to be included into a target to provide a rule
 # to "build" .isolate files into a .isolated file.
 #
 # To use this, create a gyp target with the following form:
 # 'conditions': [
@@ skipping 26 matching lines @@
 # See http://dev.chromium.org/developers/testing/isolated-testing/for-swes
 # for more information.
 
 {
   'rules': [
     {
       'rule_name': 'isolate',
       'extension': 'isolate',
       'inputs': [
         # Files that are known to be involved in this step.
+        '<(DEPTH)/tools/isolate_driver.py',
         '<(DEPTH)/tools/swarming_client/isolate.py',
         '<(DEPTH)/tools/swarming_client/run_isolated.py',
       ],
       'outputs': [
         '<(PRODUCT_DIR)/<(RULE_INPUT_ROOT).isolated',
       ],
       'action': [
         'python',
-        '<(DEPTH)/tools/swarming_client/isolate.py',
+        '<(DEPTH)/tools/isolate_driver.py',
         '<(test_isolation_mode)',
         '--isolated', '<(PRODUCT_DIR)/<(RULE_INPUT_ROOT).isolated',
         '--isolate', '<(RULE_INPUT_PATH)',
 
         # Variables should use the -V FOO=<(FOO) form so frequent values,
         # like '0' or '1', aren't stripped out by GYP. Run 'isolate.py help'
         # for more details.
 
         # Path variables are used to replace file paths when loading a .isolate
         # file
         '--path-variable', 'DEPTH', '<(DEPTH)',
         '--path-variable', 'PRODUCT_DIR', '<(PRODUCT_DIR)',
 
         '--config-variable', 'OS=<(OS)',
         '--config-variable', 'v8_use_external_startup_data=<(v8_use_external_startup_data)',
       ],
     },
   ],
 }