Function ElementsAreSafeToExamine was undefined in release heap verify.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/48963006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17422 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Temporarily allow HistogramTimerScopes to be nested

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/47513015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17425 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
ia32: Fix comparisons of two constant double operands when exactly one of them is in new space.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/46883008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17428 ce2b1a6d-e550-0410-aec6-3dcde31c8c00