Make HToFastProperties GC safe.

The runtime call can cause a GC, so the instruction must have proper flags set.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/22980003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16173 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix bug in HPhi::SimplifyConstantInput

R=jkummerow@chromium.org
BUG=269679

Review URL: https://codereview.chromium.org/23075003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16174 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Use Cell instead of PropertyCell in DoCheckFunction (in case of new space object).

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23036004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16175 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Prepare push to trunk.  Now working on version 3.20.17.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/23073003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16176 ce2b1a6d-e550-0410-aec6-3dcde31c8c00