Remove the HValueOf instruction.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/139233004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18905 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove the unused HElementsKind instruction.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/136093004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18906 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Mark next_code_link as weak in heap profiler.

LOG=N
R=ulan@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/136113007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18907 ce2b1a6d-e550-0410-aec6-3dcde31c8c00