Revert "Add debug output to presubmit script for investigating tree check behavior." and "Add more temporary debugging output to PRESUBMIT.py".

This reverts commits r18538 and r18528, since the investigated problem was found.

BUG=
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/133993002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18544 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Implement zone-allocated types"

This reverts commit 4308974b16d1ee67d9f64d797c5ea64ffaab51df.

TBR=machenbach@chromium.org
BUG=

Review URL: https://codereview.chromium.org/133353005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18545 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[Sheriff] Revert "Turn on allocation site pretenuring."

This reverts commit d57b17889a300d0978f8ed104d1274c9838904a6.

TBR=mvstanton@chromium.org
BUG=

Review URL: https://codereview.chromium.org/134113002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18546 ce2b1a6d-e550-0410-aec6-3dcde31c8c00