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

Committed: https://code.google.com/p/v8/source/detail?r=15333

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15340 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add DependentCode to PropertyCells

R=mstarzinger@chromium.org, ulan@chromium.org

Review URL: https://codereview.chromium.org/17895004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15341 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix misleading names and comments in mute local variables debugger helper

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/17644013

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15342 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove obsolete free-space checks from MarkCompactCollector.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/17840004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15343 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Avoid Unnecessary Smi Checks

BUG=
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/16026023

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15344 ce2b1a6d-e550-0410-aec6-3dcde31c8c00