In strict mode the transformation of "this" is skipped.

Code review feedback.
Testing memory operand against 8 bit IMM on ia32 and x64.

Review URL: http://codereview.chromium.org/6524006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6799 ce2b1a6d-e550-0410-aec6-3dcde31c8c00