Use `CHECK_OBJECT_COERCIBLE` macro where possible

Contributed by Mathias Bynens <mathiasb@opera.com>.

TEST=
BUG=v8:3122
LOG=N
R=arv@chromium.org

Review URL: https://codereview.chromium.org/132333019

Patch from Mathias Bynens <mathiasb@opera.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18979 ce2b1a6d-e550-0410-aec6-3dcde31c8c00