Revert of Remove find_dependencies script

tools/perf/core/find_dependencies_unittest.py

+# 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.
+
+import os
+import unittest
+
+from telemetry.core import util
+
+from core import find_dependencies
+
+
+class FindDependenciesTest(unittest.TestCase):
+
+  def testFindPythonDependencies(self):
+    try:
+      dog_object_path = os.path.join(
+          util.GetUnittestDataDir(),
+          'dependency_test_dir', 'dog', 'dog', 'dog_object.py')
+      cat_module_path = os.path.join(
+          util.GetUnittestDataDir(),
+          'dependency_test_dir', 'other_animals', 'cat', 'cat')
+      cat_module_init_path = os.path.join(cat_module_path, '__init__.py')
+      cat_object_path = os.path.join(cat_module_path, 'cat_object.py')
+      self.assertEquals(
+          set(p for p in
+              find_dependencies.FindPythonDependencies(dog_object_path)),
+          {dog_object_path, cat_module_path, cat_module_init_path,
+           cat_object_path})
+    except ImportError:  # crbug.com/559527
+      pass
+
+  def testFindPythonDependenciesWithNestedImport(self):
+    try:
+      moose_module_path = os.path.join(
+          util.GetUnittestDataDir(),
+          'dependency_test_dir', 'other_animals', 'moose', 'moose')
+      moose_object_path = os.path.join(moose_module_path, 'moose_object.py')
+      horn_module_path = os.path.join(moose_module_path, 'horn')
+      horn_module_init_path = os.path.join(horn_module_path, '__init__.py')
+      horn_object_path = os.path.join(horn_module_path, 'horn_object.py')
+      self.assertEquals(
+          set(p for p in
+              find_dependencies.FindPythonDependencies(moose_object_path)),
+          {moose_object_path,
+           horn_module_path, horn_module_init_path, horn_object_path})
+    except ImportError:   # crbug.com/559527
+      pass