There are now less that 400 days until the end of life
of Python 2(aka _legacy_ Python) https://pythonclock.org/ .
The code compatibility check for python2 and python3
used the following tools: futurize, flake8
You can see the reports here: https://travis-ci.com/bmsdave/v8/builds

This CL was uploaded by git cl split.

Bug: v8:8594
Change-Id: I661c52a70527e8ddde841fee6d4dcba282b4a938
Reviewed-on: https://chromium-review.googlesource.com/c/1470123
Commit-Queue: Sergiy Belozorov <sergiyb@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59675}

'a' and 'w' are mutually exclusive and just 'a' is what we actually
want. Linux doesn't care (it just takes the first one) but Windows
throws a ValueError.

R=machenbach@chromium.org
BUG=None

Review-Url: https://codereview.chromium.org/2467363002
Cr-Commit-Position: refs/heads/master@{#40711}

BUG=chromium:648583
NOTRY=true

Review-Url: https://codereview.chromium.org/2365573002
Cr-Commit-Position: refs/heads/master@{#39626}

This prepares using mb as a library and not as a sub
process. It is used like that in the new list command that
shows available configurations.

Also added more robust checks of user inputs, better hints
and better docu.

BUG=chromium:625791
NOTRY=true

Review-Url: https://codereview.chromium.org/2300333002
Cr-Commit-Position: refs/heads/master@{#39136}

Helper script to generate gn arguments based on common
developer defaults or builder configurations.

BUG=chromium:625791
NOTRY=true

Review-Url: https://codereview.chromium.org/2138693002
Cr-Commit-Position: refs/heads/master@{#37947}