Make --trace-code-flushing uniform with other tracing.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/17059007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15164 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Refactor only: Rename JSGlobaPropertyCell to PropertyCell

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/17064002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15165 ce2b1a6d-e550-0410-aec6-3dcde31c8c00