The code previously had to navigate through 1 (or more) indirect
pointers to find the CL flags. Since CL flags are a static field in
the global context, simplify these references. Note: I have added
member functions to do this (where appropriate) so that fixing code
could be easy if we choose to move where the command line flags are
stored.

BUG=None
R=eholk@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1845913003 .