[Telemetry] Migrate find_dependencies internals to tools/perf

tools/telemetry/telemetry/telemetry_dependencies_unittest.py

-# 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.
-
-import json
-import os
-import platform
-import sys
-import unittest
-
-from telemetry.internal.util import find_dependencies
-from telemetry.internal.util import path
-
-
-_TELEMETRY_DEPS_PATH = os.path.join(
-    path.GetTelemetryDir(), 'telemetry', 'TELEMETRY_DEPS')
-
-
-def _GetCurrentTelemetryDependencies():
-  parser = find_dependencies.FindDependenciesCommand.CreateParser()
-  find_dependencies.FindDependenciesCommand.AddCommandLineArgs(parser, None)
-  options, args = parser.parse_args([''])
-  options.positional_args = args
-  return find_dependencies.FindDependencies([], options=options)
-
-
-def _GetRestrictedTelemetryDeps():
-  with open(_TELEMETRY_DEPS_PATH, 'r') as f:
-    telemetry_deps = json.load(f)
-
-  # Normalize paths in telemetry_deps since TELEMETRY_DEPS file only contain
-  # the relative path in chromium/src/.
-  def NormalizePath(p):
-    p = p.replace('/', os.path.sep)
-    return os.path.realpath(os.path.join(path.GetChromiumSrcDir(), p))
-
-  telemetry_deps['file_deps'] = [
-      NormalizePath(p) for p in telemetry_deps['file_deps']]
-  telemetry_deps['directory_deps'] = [
-      NormalizePath(p) for p in telemetry_deps['directory_deps']]
-  return telemetry_deps
-
-
-class TelemetryDependenciesTest(unittest.TestCase):
-
-  def testNoNewTelemetryDependencies(self):
-    telemetry_deps = _GetRestrictedTelemetryDeps()
-    current_dependencies = _GetCurrentTelemetryDependencies()
-    extra_dep_paths = []
-    for dep_path in current_dependencies:
-      if not (dep_path in telemetry_deps['file_deps'] or
-              any(path.IsSubpath(dep_path, d)
-                  for d in telemetry_deps['directory_deps'])):
-        extra_dep_paths.append(dep_path)
-    # Temporarily ignore failure on Mac because test is failing on Mac 10.8 bot.
-    # crbug.com/522335
-    if extra_dep_paths:
-      if platform.system() != 'Darwin':
-        self.fail(
-            'Your patch adds new dependencies to telemetry. Please contact '
-            'aiolos@,dtu@, or nednguyen@ on how to proceed with this change. '
-            'Extra dependencies:\n%s' % '\n'.join(extra_dep_paths))
-      else:
-        print ('Dependencies check failed on mac platform. Extra deps: %s\n'
-               ' sys.path: %s' % (extra_dep_paths, sys.path))