Remove a bunch of cruft from //build.

build/find_isolated_tests.py

Index: build/find_isolated_tests.py
diff --git a/build/find_isolated_tests.py b/build/find_isolated_tests.py
deleted file mode 100755
index c5b3ab77a90454ceade7215d17515b8c20757e02..0000000000000000000000000000000000000000
--- a/build/find_isolated_tests.py
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env python
-# Copyright 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.
-
-"""Scans build output directory for .isolated files, calculates their SHA1
-hashes, stores final list in JSON document and then removes *.isolated files
-found (to ensure no stale *.isolated stay around on the next build).
-
-Used to figure out what tests were build in isolated mode to trigger these
-tests to run on swarming.
-
-For more info see:
-https://sites.google.com/a/chromium.org/dev/developers/testing/isolated-testing
-"""
-
-import glob
-import hashlib
-import json
-import optparse
-import os
-import re
-import sys
-
-
-def hash_file(filepath):
-  """Calculates the hash of a file without reading it all in memory at once."""
-  digest = hashlib.sha1()
-  with open(filepath, 'rb') as f:
-    while True:
-      chunk = f.read(1024*1024)
-      if not chunk:
-        break
-      digest.update(chunk)
-  return digest.hexdigest()
-
-
-def main():
-  parser = optparse.OptionParser(
-      usage='%prog --build-dir <path> --output-json <path>',
-      description=sys.modules[__name__].__doc__)
-  parser.add_option(
-      '--build-dir',
-      help='Path to a directory to search for *.isolated files.')
-  parser.add_option(
-      '--output-json',
-      help='File to dump JSON results into.')
-
-  options, _ = parser.parse_args()
-  if not options.build_dir:
-    parser.error('--build-dir option is required')
-  if not options.output_json:
-    parser.error('--output-json option is required')
-
-  result = {}
-
-  # Get the file hash values and output the pair.
-  pattern = os.path.join(options.build_dir, '*.isolated')
-  for filepath in sorted(glob.glob(pattern)):
-    test_name = os.path.splitext(os.path.basename(filepath))[0]
-    if re.match(r'^.+?\.\d$', test_name):
-      # It's a split .isolated file, e.g. foo.0.isolated. Ignore these.
-      continue
-
-    # TODO(csharp): Remove deletion once the isolate tracked dependencies are
-    # inputs for the isolated files.
-    sha1_hash = hash_file(filepath)
-    os.remove(filepath)
-    result[test_name] = sha1_hash
-
-  with open(options.output_json, 'wb') as f:
-    json.dump(result, f)
-
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())