Changelist is Perforce-speak for changeset. Because each CL gets an individual review before applying to the codebase, there is no merge process -- there is no branching/merging.
There is a solution for project/directory-level CC / review requirements. I didn't see it discussed in the talk, though.
There is a solution for project/directory-level CC / review requirements. I didn't see it discussed in the talk, though.