The full code generator is not a proper Hydrogen phase. The full code
gen ticks are tracked in a special member of HStatistics, so HPhase is
most probably misused at this point.

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/17590005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15291 ce2b1a6d-e550-0410-aec6-3dcde31c8c00