This is the first step to migrate binding code generator
from perl to python (with jinja template engine).

R=haraken@chromium.org
BUG=262365
TEST=no tests. refactoring.

Review URL: https://chromiumcodereview.appspot.com/19607011

git-svn-id: svn://svn.chromium.org/blink/trunk@155080 bbb929c8-8fbe-4397-9dbb-9b2b20218538