Fix an implicit cast from int64 to double in the i18n extension

On MSVS, this throws an error

BUG=v8:2745
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18854002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15557 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Introduce a handle zapping setting, and enable it by default for release and debug" due to performance impact.

R=jochen@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18325027

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15558 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert^2 "Derive synthetic type bounds for expressions""

Reverts https://codereview.chromium.org/17842004 (again), due to SS regression.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/18337003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15559 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix stupidity

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/18801004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15560 ce2b1a6d-e550-0410-aec6-3dcde31c8c00