[Mac] Rewrite tweak_info_plist as a Python script instead of bash.

The output is identical to that of the bash script; no other changes are included
in this CL.

BUG=80558
TEST=Build a branded Chrome and everything is as it should be.


Review URL: http://codereview.chromium.org/7029018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@85761 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed