Remove make-css-file-arrays.pl.

Use make-file-arrays.py instead. 
Now we don't need perl to build Blink.  We still need perl to run layout
tests.

- We remove action_useragentstylesheets.py wrapper too.
- make-file-arrays.py supports file names including '-' for view-source.css.
- make-file-arrays.py removes unnecessary EOL characters in order to make the
  behaivor same as make-css-file-arrays.pl.
- Change generated variable names for consistency.

BUG=347863

Review URL: https://codereview.chromium.org/361693004

git-svn-id: svn://svn.chromium.org/blink/trunk@177264 bbb929c8-8fbe-4397-9dbb-9b2b20218538