depot_tools: Include httplib2 using vpython.

Bug: 1002153
Change-Id: I940b9d834c2f76caab2bd86fc5d5d5c3b03b4b46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1871763Reviewed-by: Anthony Polito <apolito@google.com>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

.vpython

 python_version: "2.7"
+
+# Used by:
+#   auth.py
+#   gerrit_util.py
+#   git_cl.py
+#   my_activity.py
+#   TODO(crbug.com/1002153): Add ninjalog_uploader.py
+wheel: <
+  name: "infra/python/wheels/httplib2-py2_py3"
+  version: "version:0.10.3"
+>
+
+# Used by:
+#   my_activity.py
+wheel: <
+  name: "infra/python/wheels/python-dateutil-py2_py3"
+  version: "version:2.7.3"
+>
+wheel: <
+  name: "infra/python/wheels/six-py2_py3"
+  version: "version:1.10.0"
+>

auth.py

@@ -9,14 +9,13 @@ from __future__ import print_function
 import collections
 import datetime
 import functools
+import httplib2
 import json
 import logging
 import os
 
 import subprocess2
 
-from third_party import httplib2
-
 
 # This is what most GAE apps require for authentication.
 OAUTH_SCOPE_EMAIL = 'https://www.googleapis.com/auth/userinfo.email'

gerrit_util.py

@@ -14,6 +14,7 @@ import base64
 import contextlib
 import cookielib
 import httplib  # Still used for its constants.
+import httplib2
 import json
 import logging
 import netrc
@@ -35,7 +36,6 @@ import gclient_utils
 import metrics
 import metrics_utils
 import subprocess2
-from third_party import httplib2
 
 LOGGER = logging.getLogger()
 # With a starting sleep time of 1.5 seconds, 2^n exponential backoff, and seven

git_cl.py

@@ -16,6 +16,7 @@ import collections
 import datetime
 import glob
 import httplib
+import httplib2
 import itertools
 import json
 import logging
@@ -37,7 +38,6 @@ import webbrowser
 import zlib
 
 from third_party import colorama
-from third_party import httplib2
 import auth
 import clang_format
 import dart_format

my_activity.py

@@ -21,23 +21,13 @@ Example:
 # check those details to determine if there was activity in the given period.
 # This means that query time scales mostly with (today() - begin).
 
-# [VPYTHON:BEGIN]
-# wheel: <
-#   name: "infra/python/wheels/python-dateutil-py2_py3"
-#   version: "version:2.7.3"
-# >
-# wheel: <
-#   name: "infra/python/wheels/six-py2_py3"
-#   version: "version:1.10.0"
-# >
-# [VPYTHON:END]
-
 from __future__ import print_function
 
 import collections
 import contextlib
 from datetime import datetime
 from datetime import timedelta
+import httplib2
 import itertools
 import json
 import logging
@@ -54,7 +44,6 @@ import auth
 import fix_encoding
 import gerrit_util
 
-from third_party import httplib2
 
 try:
   import dateutil  # pylint: disable=import-error