Convert isolate.py to exclusively use .isolate files.

tools/isolate/data/isolate/child.py

+#!/usr/bin/env python
+# 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.
+
+import os
+import sys
+
+
+def main():
+  print 'child: verify the test data files were mapped properly'
+  files = os.listdir('files1')
+  tree = {
+    'test_file1.txt': 'Foo\n',
+    'test_file2.txt': 'Bar\n',
+  }
+  if files != tree.keys():
+    print '%s != %s' % (files, tree.keys())
+    return 2
+  for k, v in tree.iteritems():
+    content = open(os.path.join('files1', k), 'rb').read()
+    if v != content:
+      print '%s: %r != %r' % (k, v, content)
+      return 3
+
+  if sys.argv[1] == '--ok':
+    return 0
+  elif sys.argv[1] == '--fail':
+    return 1
+  return 4
+
+
+if __name__ == '__main__':
+  sys.exit(main())