Visit return statement of inlined function in value context.

BUG=354357
LOG=N
TEST=mjsunit/regress/regress-354357.js
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/206413005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20158 ce2b1a6d-e550-0410-aec6-3dcde31c8c00