Add proguard_verbose GN arg

build/android/gyp/proguard.py

 #!/usr/bin/env python
 #
 # Copyright 2013 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.
 
 import optparse
 import os
 import sys
 
@@ skipping 43 matching lines @@
   proguard.outjar(options.output_path)
 
   if options.mapping:
     proguard.mapping(options.mapping)
 
   if options.tested_apk_info:
     proguard.tested_apk_info(options.tested_apk_info)
 
   classpath = list(set(options.classpath))
   proguard.libraryjars(classpath)
+  proguard.verbose(options.verbose)
 
   input_paths = proguard.GetInputs()
 
   build_utils.CallAndWriteDepfileIfStale(
-      lambda: proguard.CheckOutput(options.verbose),
+      proguard.CheckOutput,
       options,
       input_paths=input_paths,
       input_strings=proguard.build(),
       output_paths=[options.output_path])
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))