Set the browspr log level and vmodule from the extension settings.
Set the browspr log level and vmodule from the extension settings.

Fixes https://github.com/veyron/release-issues/issues/750

MultiPart 2/2

Change-Id: Ida263ae11d4ff1bab37de2e7a000e8b51c72ff6a

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref