Tag handlers as HANDLER rather than STUB.

R=ulan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25044002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17012 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Tag normal as handlers, and make code handler-specific.

BUG=
R=ulan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/25049003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17013 ce2b1a6d-e550-0410-aec6-3dcde31c8c00