Add support for Python3 in setup files

Future versions of macOS won't include Python2 and it is recommended
that we run Python3 from the terminal as Python2 is no longer supported.

- map() returns an iterator instead of a list in Python3. Using list
comprehension instead.
- New octal notation

Bug: 1068191, 942720
Change-Id: Idec9a22b81bf95fe8e026cd2157f662aab9afb47
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2231064
Commit-Queue: Roberto Moura <mouraroberto@google.com>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#776445}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: d63e2795c9504823faa085516573a17580f5e6f8

config/mac/prepare_framework_version.py

@@ -31,7 +31,7 @@ def PrepareFrameworkVersion(version_file, framework_root_dir, version):
   # directory exists.
   dirname = os.path.dirname(version_file)
   if not os.path.isdir(dirname):
-    os.makedirs(dirname, 0700)
+    os.makedirs(dirname, 0o700)
 
   with open(version_file, 'w+') as f:
     f.write(version)

mac/find_sdk.py

@@ -39,7 +39,7 @@ class SdkError(Exception):
 
 def parse_version(version_str):
   """'10.6' => [10, 6]"""
-  return map(int, re.findall(r'(\d+)', version_str))
+  return [int(s) for s in re.findall(r'(\d+)', version_str)]
 
 
 def main():