convert list_proxies to base::CommandLine

We need libbase already, so use that for command line processing rather
than gflags.

BUG=None
TEST=`FEATURES=test emerge-x86-alex platform2` builds & runs crash tests
TEST=`list_proxies --help` works
TEST=ran other list_proxies commands and checked results

Change-Id: I569fa88edb8fee4d6920965d644f69a0998a3202
Reviewed-on: https://chromium-review.googlesource.com/184627
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
2 files changed
tree: fa48e5346b0b85a84d12bc90e50007faf362e0a8
  1. crash_reporter/