Currently it's in the Code object for some ICs and in ICs for other ICs.
This should make it easier to alter bits as needed.

2) Recover an extra bit in the code object to give us 6 bits for the extra ic state. We'll need it soon to store contextual state.

3) Cleanup code that treated StrictMode enum and ExtraICState enum as interchangeble.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/91803003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18136 ce2b1a6d-e550-0410-aec6-3dcde31c8c00