Remove log filtering and add stringsetflag.

common/logging/exported.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package logging
 
 import (
         "golang.org/x/net/context"
 )
 
-// SetFilter sets the context's logging filter value.
-func SetFilter(c context.Context, filter string) context.Context {
-        return SetField(c, FilterOnKey, filter)
-}
-
 // SetError returns a context with its error field set.
 func SetError(c context.Context, err error) context.Context {
         return SetField(c, ErrorKey, err)
 }
 
 // IsLogging tests whether the currently-configured logger is logging at the
 // specified level.
 func IsLogging(c context.Context, l Level) bool {
         return l >= GetLevel(c)
 }
@@ skipping 10 matching lines @@
 
 // Warningf is a shorthand method to call the current logger's Errorf method.
 func Warningf(c context.Context, fmt string, args ...interface{}) {
         Get(c).LogCall(Warning, 1, fmt, args)
 }
 
 // Errorf is a shorthand method to call the current logger's Errorf method.
 func Errorf(c context.Context, fmt string, args ...interface{}) {
         Get(c).LogCall(Error, 1, fmt, args)
 }