Change IS_UNDEFINED to perform value comparison instead on typeof check.

This makes our builtins immune to bug v8:3264.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/241003002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20850 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Bump up the boot-up memory limit.

... to compansate for the extre memory consumed by r20840
("Select function map based on prototype and shared function info.")

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/239513015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20851 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handlify PolymorphicCodeCache.

R=yangguo@chromium.org, yannguo@chromium.org

Review URL: https://codereview.chromium.org/240093003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20852 ce2b1a6d-e550-0410-aec6-3dcde31c8c00