Revert "[py3.12] [tools] Remove imp usage"

This reverts commit 27c222d.

Reason for revert: Suspected cause of b/308216872

Original change's description:
> [py3.12] [tools] Remove imp usage
>
> And use its equivalent instead.
>
> Bug: 1487454
> Change-Id: Ie78c266106bd1f9a29fd8bd3394f233e90d330e0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4983816
> Commit-Queue: Ho Cheung <uioptt24@gmail.com>
> Reviewed-by: Dirk Pranke <dpranke@google.com>
> Cr-Commit-Position: refs/heads/main@{#1216473}

Bug: 1487454
Change-Id: If22b3a404dacd45b3c14a111c55d586499a107a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4988601
Commit-Queue: Nic Hollingum <hollingum@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Nic Hollingum <hollingum@google.com>
Cr-Commit-Position: refs/heads/main@{#1216729}

tools/perf/core/find_dependencies.py

@@ -6,7 +6,7 @@
 
 import collections
 import fnmatch
-import importlib.util
+import imp
 import logging
 import os
 import sys
@@ -53,10 +53,8 @@ def FindPythonDependencies(module_path):
   try:
     # Load the module to inherit its sys.path modifications.
     sys.path.insert(0, os.path.abspath(os.path.dirname(module_path)))
-    spec = importlib.util.spec_from_file_location(
+    imp.load_source(
         os.path.splitext(os.path.basename(module_path))[0], module_path)
-    module = importlib.util.module_from_spec(spec)
-    spec.loader.exec_module(module)
 
     # Analyze the module for its imports.
     graph = modulegraph.ModuleGraph()

tools/sublime/ninja_options_script.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 # Copyright 2016 The Chromium Authors
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
@@ -16,18 +16,15 @@
 
 from __future__ import print_function
 
-import importlib.util
+import imp
 import optparse
 import os
 import shlex
 
 ycm_module_path = os.path.normpath(
     os.path.join(os.path.dirname(os.path.abspath(__file__)),
     '../vim/chromium.ycm_extra_conf.py'))
-spec = importlib.util.spec_from_file_location("ycm_extra_conf", ycm_module_path)
-ycm_extra_conf = importlib.util.module_from_spec(spec)
-spec.loader.exec_module(ycm_extra_conf)
-
+ycm_extra_conf = imp.load_source('ycm_extra_conf', ycm_module_path)
 
 def main():
   usage = "usage: %prog [options] file"

tools/vim/tests/chromium.ycm_extra_conf_unittest.py

@@ -10,7 +10,7 @@
 PATH. Due to these requirements, the tests should only be run on upload.
 """
 
-import importlib.util
+import imp
 import os
 import shutil
 import stat
@@ -123,10 +123,8 @@ def setUp(self):
     sys.path.append(os.path.join(self.actual_chrome_root, 'tools', 'vim'))
     self.test_data_path = os.path.join(self.actual_chrome_root, 'tools', 'vim',
                                        'tests', 'data')
-    ycm_extra_conf_spec = importlib.util.spec_from_file_location(
-        'ycm_extra_conf', 'chromium.ycm_extra_conf.py')
-    self.ycm_extra_conf = importlib.util.module_from_spec(ycm_extra_conf_spec)
-    ycm_extra_conf_spec.loader.exec_module(self.ycm_extra_conf)
+    self.ycm_extra_conf = imp.load_source('ycm_extra_conf',
+                                          'chromium.ycm_extra_conf.py')
     self.test_root = tempfile.mkdtemp()
     self.SetUpFakeChromeTreeBelowPath()