[Telemetry] Migrate find_dependencies internals to tools/perf

tools/perf/core/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
+# TODO(eakuefner): Remove this test once Telemetry lives in Catapult.
 import os
 import platform
 import sys
 import unittest
 
-from telemetry.internal.util import find_dependencies
 from telemetry.internal.util import path
 
+from core import find_dependencies
+from core import path_util
 
-_TELEMETRY_DEPS_PATH = os.path.join(
-    path.GetTelemetryDir(), 'telemetry', 'TELEMETRY_DEPS')
+_TELEMETRY_DEPS = [
+    'build/android/devil/',
+    'build/android/pylib/',
+    'third_party/catapult/',
+    'tools/telemetry/']
 
 
 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))
+    return os.path.realpath(os.path.join(path_util.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
+  return map(NormalizePath, _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'])):
+      if not any(path.IsSubpath(dep_path, d) for d in telemetry_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))