Fix duplicate check in DependentCode::Insert.

R=ulan@chromium.org
BUG=318454

Review URL: https://codereview.chromium.org/71653008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17747 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove unused LoadNumber* from ARM macro assembler.

R=ulan@chromium.org
BUG=

Review URL: https://codereview.chromium.org/70093002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17748 ce2b1a6d-e550-0410-aec6-3dcde31c8c00