Make use of templatized convienience functions for adding Hydrogen instructions.

Building on the previous changes from https://codereview.chromium.org/18050004/
this patch makes even more use of the templatized functions for adding
Hydrogen instructions.

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/18051010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15379 ce2b1a6d-e550-0410-aec6-3dcde31c8c00