Update path to test_env.py for Windows and Mac tests.

testing/chromoting/chromoting_integration_tests.isolate

 # Copyright (c) 2014 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': [
     ['OS=="linux"', {
       'variables': {
         'command': [
           './browser_tests_launcher.py',
           '-f',
@@ skipping 34 matching lines @@
       'variables': {
         'files': [
           '<(PRODUCT_DIR)/chrome_100_percent.pak',
           '<(PRODUCT_DIR)/locales/en-US.pak',
         ],
       },
     }],
     ['OS=="mac" or OS=="win"', {
       'variables': {
         'command': [
-          '../testing/test_env.py',
+          '../test_env.py',
           '<(PRODUCT_DIR)/browser_tests<(EXECUTABLE_SUFFIX)',
           '--gtest_filter=RemoteDesktopBrowserTest.MANUAL_Launch',
           '--run-manual',
           '--ui-test-action-timeout=100000',
           '--webapp-unpacked=<(PRODUCT_DIR)/remoting/remoting.webapp',
           '--extension-name=Chromoting',
         ],
       },
     }],
   ],
   'includes': [
     '../../base/base.isolate',
   ],
 }