Introduce Unsigned32 and RegExp types

Also, renamed Integer31 back to Smi, and Integer32 to Signed32.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/17589013

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15332 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
CPUProfiler: Simplify CodeEntry constructor calls.

In almost all the places where we create CodeEntry we use default values.
Lets move them into arguments default values.

BUG=none
TEST=no logic changes.
R=yangguo@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/17836002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15333 ce2b1a6d-e550-0410-aec6-3dcde31c8c00