Allow --v and --log-level switches simultaneous usage.
Allow --v and --log-level switches simultaneous usage.

The current implementation, in fact, doesn't support specifying both
"--v" and "--log-level" command line switches: only "--log-level" switch
will take an effect. This looks counterintuitive.

For example, browser_tests always start the browser with the
"--log-level" switch specified, so with current implementation there's
no way to enable vlogging in browser_tests using a command line.

The suggestion is, as both of the options refer to the same underlying
"min_log_level", to make the "--v" switch have a higher priority.

BUG=

Review URL: https://codereview.chromium.org/1136463009

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#330218}

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